April 2024 - Linux-stable-mirror

FAILED: patch "[PATCH] USB: core: Fix deadlock in port "disable" sysfs attribute" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x f4d1960764d8a70318b02f15203a1be2b2554ca1 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040116-mortician-grudging-9be5@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: f4d1960764d8 ("USB: core: Fix deadlock in port "disable" sysfs attribute") f061f43d7418 ("usb: hub: port: add sysfs entry to switch port power") 8c67d06f3fd9 ("usb: Link the ports to the connectors they are attached to") b8f1ba99cea5 ("usb: hub: make wait_for_connected() take an int instead of a pointer to int") f59f93cd1d72 ("usb: hub: avoid warm port reset during USB3 disconnect") 7142452387c7 ("USB: Verify the port status when timeout happens during port suspend") 975f94c7d6c3 ("usb: core: hub: fix race condition about TRSMRCY of resume") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f4d1960764d8a70318b02f15203a1be2b2554ca1 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 15 Mar 2024 13:06:33 -0400 Subject: [PATCH] USB: core: Fix deadlock in port "disable" sysfs attribute The show and store callback routines for the "disable" sysfs attribute file in port.c acquire the device lock for the port's parent hub device. This can cause problems if another process has locked the hub to remove it or change its configuration: Removing the hub or changing its configuration requires the hub interface to be removed, which requires the port device to be removed, and device_del() waits until all outstanding sysfs attribute callbacks for the ports have returned. The lock can't be released until then. But the disable_show() or disable_store() routine can't return until after it has acquired the lock. The resulting deadlock can be avoided by calling sysfs_break_active_protection(). This will cause the sysfs core not to wait for the attribute's callback routine to return, allowing the removal to proceed. The disadvantage is that after making this call, there is no guarantee that the hub structure won't be deallocated at any moment. To prevent this, we have to acquire a reference to it first by calling hub_get(). Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Cc: stable <stable(a)kernel.org> Link: https://lore.kernel.org/r/f7a8c135-a495-4ce6-bd49-405a45e7ea9a@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 5b5e613a11e5..686c01af03e6 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -56,11 +56,22 @@ static ssize_t disable_show(struct device *dev, u16 portstatus, unused; bool disabled; int rc; + struct kernfs_node *kn; + hub_get(hub); rc = usb_autopm_get_interface(intf); if (rc < 0) - return rc; + goto out_hub_get; + /* + * Prevent deadlock if another process is concurrently + * trying to unregister hdev. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (!kn) { + rc = -ENODEV; + goto out_autopm; + } usb_lock_device(hdev); if (hub->disconnected) { rc = -ENODEV; @@ -70,9 +81,13 @@ static ssize_t disable_show(struct device *dev, usb_hub_port_status(hub, port1, &portstatus, &unused); disabled = !usb_port_is_power_on(hub, portstatus); -out_hdev_lock: + out_hdev_lock: usb_unlock_device(hdev); + sysfs_unbreak_active_protection(kn); + out_autopm: usb_autopm_put_interface(intf); + out_hub_get: + hub_put(hub); if (rc) return rc; @@ -90,15 +105,26 @@ static ssize_t disable_store(struct device *dev, struct device_attribute *attr, int port1 = port_dev->portnum; bool disabled; int rc; + struct kernfs_node *kn; rc = kstrtobool(buf, &disabled); if (rc) return rc; + hub_get(hub); rc = usb_autopm_get_interface(intf); if (rc < 0) - return rc; + goto out_hub_get; + /* + * Prevent deadlock if another process is concurrently + * trying to unregister hdev. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (!kn) { + rc = -ENODEV; + goto out_autopm; + } usb_lock_device(hdev); if (hub->disconnected) { rc = -ENODEV; @@ -119,9 +145,13 @@ static ssize_t disable_store(struct device *dev, struct device_attribute *attr, if (!rc) rc = count; -out_hdev_lock: + out_hdev_lock: usb_unlock_device(hdev); + sysfs_unbreak_active_protection(kn); + out_autopm: usb_autopm_put_interface(intf); + out_hub_get: + hub_put(hub); return rc; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Fix deadlock in port "disable" sysfs attribute" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x f4d1960764d8a70318b02f15203a1be2b2554ca1 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040114-outer-channel-e465@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: f4d1960764d8 ("USB: core: Fix deadlock in port "disable" sysfs attribute") f061f43d7418 ("usb: hub: port: add sysfs entry to switch port power") 8c67d06f3fd9 ("usb: Link the ports to the connectors they are attached to") b8f1ba99cea5 ("usb: hub: make wait_for_connected() take an int instead of a pointer to int") f59f93cd1d72 ("usb: hub: avoid warm port reset during USB3 disconnect") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f4d1960764d8a70318b02f15203a1be2b2554ca1 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 15 Mar 2024 13:06:33 -0400 Subject: [PATCH] USB: core: Fix deadlock in port "disable" sysfs attribute The show and store callback routines for the "disable" sysfs attribute file in port.c acquire the device lock for the port's parent hub device. This can cause problems if another process has locked the hub to remove it or change its configuration: Removing the hub or changing its configuration requires the hub interface to be removed, which requires the port device to be removed, and device_del() waits until all outstanding sysfs attribute callbacks for the ports have returned. The lock can't be released until then. But the disable_show() or disable_store() routine can't return until after it has acquired the lock. The resulting deadlock can be avoided by calling sysfs_break_active_protection(). This will cause the sysfs core not to wait for the attribute's callback routine to return, allowing the removal to proceed. The disadvantage is that after making this call, there is no guarantee that the hub structure won't be deallocated at any moment. To prevent this, we have to acquire a reference to it first by calling hub_get(). Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Cc: stable <stable(a)kernel.org> Link: https://lore.kernel.org/r/f7a8c135-a495-4ce6-bd49-405a45e7ea9a@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 5b5e613a11e5..686c01af03e6 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -56,11 +56,22 @@ static ssize_t disable_show(struct device *dev, u16 portstatus, unused; bool disabled; int rc; + struct kernfs_node *kn; + hub_get(hub); rc = usb_autopm_get_interface(intf); if (rc < 0) - return rc; + goto out_hub_get; + /* + * Prevent deadlock if another process is concurrently + * trying to unregister hdev. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (!kn) { + rc = -ENODEV; + goto out_autopm; + } usb_lock_device(hdev); if (hub->disconnected) { rc = -ENODEV; @@ -70,9 +81,13 @@ static ssize_t disable_show(struct device *dev, usb_hub_port_status(hub, port1, &portstatus, &unused); disabled = !usb_port_is_power_on(hub, portstatus); -out_hdev_lock: + out_hdev_lock: usb_unlock_device(hdev); + sysfs_unbreak_active_protection(kn); + out_autopm: usb_autopm_put_interface(intf); + out_hub_get: + hub_put(hub); if (rc) return rc; @@ -90,15 +105,26 @@ static ssize_t disable_store(struct device *dev, struct device_attribute *attr, int port1 = port_dev->portnum; bool disabled; int rc; + struct kernfs_node *kn; rc = kstrtobool(buf, &disabled); if (rc) return rc; + hub_get(hub); rc = usb_autopm_get_interface(intf); if (rc < 0) - return rc; + goto out_hub_get; + /* + * Prevent deadlock if another process is concurrently + * trying to unregister hdev. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (!kn) { + rc = -ENODEV; + goto out_autopm; + } usb_lock_device(hdev); if (hub->disconnected) { rc = -ENODEV; @@ -119,9 +145,13 @@ static ssize_t disable_store(struct device *dev, struct device_attribute *attr, if (!rc) rc = count; -out_hdev_lock: + out_hdev_lock: usb_unlock_device(hdev); + sysfs_unbreak_active_protection(kn); + out_autopm: usb_autopm_put_interface(intf); + out_hub_get: + hub_put(hub); return rc; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Add hub_get() and hub_put() routines" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x ee113b860aa169e9a4d2c167c95d0f1961c6e1b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040159-scurvy-gestation-ae70@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: ee113b860aa1 ("USB: core: Add hub_get() and hub_put() routines") 3a6bf4a08142 ("usb: core: hub: Create platform devices for onboard hubs in hub_probe()") 1208f9e1d758 ("USB: hub: Fix the broken detection of USB3 device in SMSC hub") 95d23dc27bde ("usb, kcov: collect coverage from hub_event") 8eb58994dd96 ("usb: hub: add retry routine after intr URB submit error") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From ee113b860aa169e9a4d2c167c95d0f1961c6e1b8 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 15 Mar 2024 13:04:50 -0400 Subject: [PATCH] USB: core: Add hub_get() and hub_put() routines Create hub_get() and hub_put() routines to encapsulate the kref_get() and kref_put() calls in hub.c. The new routines will be used by the next patch in this series. Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/r/604da420-ae8a-4a9e-91a4-2d511ff404fb@rowland.harv… Cc: stable <stable(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 3ee8455585b6..9446660e231b 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -130,7 +130,6 @@ EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem); #define HUB_DEBOUNCE_STEP 25 #define HUB_DEBOUNCE_STABLE 100 -static void hub_release(struct kref *kref); static int usb_reset_and_verify_device(struct usb_device *udev); static int hub_port_disable(struct usb_hub *hub, int port1, int set_state); static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1, @@ -720,14 +719,14 @@ static void kick_hub_wq(struct usb_hub *hub) */ intf = to_usb_interface(hub->intfdev); usb_autopm_get_interface_no_resume(intf); - kref_get(&hub->kref); + hub_get(hub); if (queue_work(hub_wq, &hub->events)) return; /* the work has already been scheduled */ usb_autopm_put_interface_async(intf); - kref_put(&hub->kref, hub_release); + hub_put(hub); } void usb_kick_hub_wq(struct usb_device *hdev) @@ -1095,7 +1094,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) goto init2; goto init3; } - kref_get(&hub->kref); + hub_get(hub); /* The superspeed hub except for root hub has to use Hub Depth * value as an offset into the route string to locate the bits @@ -1343,7 +1342,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) device_unlock(&hdev->dev); } - kref_put(&hub->kref, hub_release); + hub_put(hub); } /* Implement the continuations for the delays above */ @@ -1759,6 +1758,16 @@ static void hub_release(struct kref *kref) kfree(hub); } +void hub_get(struct usb_hub *hub) +{ + kref_get(&hub->kref); +} + +void hub_put(struct usb_hub *hub) +{ + kref_put(&hub->kref, hub_release); +} + static unsigned highspeed_hubs; static void hub_disconnect(struct usb_interface *intf) @@ -1807,7 +1816,7 @@ static void hub_disconnect(struct usb_interface *intf) onboard_hub_destroy_pdevs(&hub->onboard_hub_devs); - kref_put(&hub->kref, hub_release); + hub_put(hub); } static bool hub_descriptor_is_sane(struct usb_host_interface *desc) @@ -5934,7 +5943,7 @@ static void hub_event(struct work_struct *work) /* Balance the stuff in kick_hub_wq() and allow autosuspend */ usb_autopm_put_interface(intf); - kref_put(&hub->kref, hub_release); + hub_put(hub); kcov_remote_stop(); } diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index 43ce21c96a51..183b69dc2955 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -129,6 +129,8 @@ extern void usb_hub_remove_port_device(struct usb_hub *hub, extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, int port1, bool set); extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev); +extern void hub_get(struct usb_hub *hub); +extern void hub_put(struct usb_hub *hub); extern int hub_port_debounce(struct usb_hub *hub, int port1, bool must_be_connected); extern int usb_clear_port_feature(struct usb_device *hdev,

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Add hub_get() and hub_put() routines" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x ee113b860aa169e9a4d2c167c95d0f1961c6e1b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040158-stump-bucked-e91c@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: ee113b860aa1 ("USB: core: Add hub_get() and hub_put() routines") 3a6bf4a08142 ("usb: core: hub: Create platform devices for onboard hubs in hub_probe()") 1208f9e1d758 ("USB: hub: Fix the broken detection of USB3 device in SMSC hub") 95d23dc27bde ("usb, kcov: collect coverage from hub_event") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From ee113b860aa169e9a4d2c167c95d0f1961c6e1b8 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Fri, 15 Mar 2024 13:04:50 -0400 Subject: [PATCH] USB: core: Add hub_get() and hub_put() routines Create hub_get() and hub_put() routines to encapsulate the kref_get() and kref_put() calls in hub.c. The new routines will be used by the next patch in this series. Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/r/604da420-ae8a-4a9e-91a4-2d511ff404fb@rowland.harv… Cc: stable <stable(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 3ee8455585b6..9446660e231b 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -130,7 +130,6 @@ EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem); #define HUB_DEBOUNCE_STEP 25 #define HUB_DEBOUNCE_STABLE 100 -static void hub_release(struct kref *kref); static int usb_reset_and_verify_device(struct usb_device *udev); static int hub_port_disable(struct usb_hub *hub, int port1, int set_state); static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1, @@ -720,14 +719,14 @@ static void kick_hub_wq(struct usb_hub *hub) */ intf = to_usb_interface(hub->intfdev); usb_autopm_get_interface_no_resume(intf); - kref_get(&hub->kref); + hub_get(hub); if (queue_work(hub_wq, &hub->events)) return; /* the work has already been scheduled */ usb_autopm_put_interface_async(intf); - kref_put(&hub->kref, hub_release); + hub_put(hub); } void usb_kick_hub_wq(struct usb_device *hdev) @@ -1095,7 +1094,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) goto init2; goto init3; } - kref_get(&hub->kref); + hub_get(hub); /* The superspeed hub except for root hub has to use Hub Depth * value as an offset into the route string to locate the bits @@ -1343,7 +1342,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) device_unlock(&hdev->dev); } - kref_put(&hub->kref, hub_release); + hub_put(hub); } /* Implement the continuations for the delays above */ @@ -1759,6 +1758,16 @@ static void hub_release(struct kref *kref) kfree(hub); } +void hub_get(struct usb_hub *hub) +{ + kref_get(&hub->kref); +} + +void hub_put(struct usb_hub *hub) +{ + kref_put(&hub->kref, hub_release); +} + static unsigned highspeed_hubs; static void hub_disconnect(struct usb_interface *intf) @@ -1807,7 +1816,7 @@ static void hub_disconnect(struct usb_interface *intf) onboard_hub_destroy_pdevs(&hub->onboard_hub_devs); - kref_put(&hub->kref, hub_release); + hub_put(hub); } static bool hub_descriptor_is_sane(struct usb_host_interface *desc) @@ -5934,7 +5943,7 @@ static void hub_event(struct work_struct *work) /* Balance the stuff in kick_hub_wq() and allow autosuspend */ usb_autopm_put_interface(intf); - kref_put(&hub->kref, hub_release); + hub_put(hub); kcov_remote_stop(); } diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index 43ce21c96a51..183b69dc2955 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -129,6 +129,8 @@ extern void usb_hub_remove_port_device(struct usb_hub *hub, extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, int port1, bool set); extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev); +extern void hub_get(struct usb_hub *hub); +extern void hub_put(struct usb_hub *hub); extern int hub_port_debounce(struct usb_hub *hub, int port1, bool must_be_connected); extern int usb_clear_port_feature(struct usb_device *hdev,

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Fix deadlock in usb_deauthorize_interface()" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 80ba43e9f799cbdd83842fc27db667289b3150f5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040155-shakiness-romp-690e@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: 80ba43e9f799 ("USB: core: Fix deadlock in usb_deauthorize_interface()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 80ba43e9f799cbdd83842fc27db667289b3150f5 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Tue, 12 Mar 2024 11:48:23 -0400 Subject: [PATCH] USB: core: Fix deadlock in usb_deauthorize_interface() Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219(a)gmail.com> Reported by: xingwei lee <xrivendell7(a)gmail.com> Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/linux-usb/CAEkJfYO6jRVC8Tfrd_R=cjO0hguhrV31fDPrLrNO… Fixes: 310d2b4124c0 ("usb: interface authorization: SysFS part of USB interface authorization") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/1c37eea1-9f56-4534-b9d8-b443438dc869@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index f98263e21c2a..d83231d6736a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -1217,14 +1217,24 @@ static ssize_t interface_authorized_store(struct device *dev, { struct usb_interface *intf = to_usb_interface(dev); bool val; + struct kernfs_node *kn; if (kstrtobool(buf, &val) != 0) return -EINVAL; - if (val) + if (val) { usb_authorize_interface(intf); - else - usb_deauthorize_interface(intf); + } else { + /* + * Prevent deadlock if another process is concurrently + * trying to unregister intf. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (kn) { + usb_deauthorize_interface(intf); + sysfs_unbreak_active_protection(kn); + } + } return count; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Fix deadlock in usb_deauthorize_interface()" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 80ba43e9f799cbdd83842fc27db667289b3150f5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040154-partner-wizard-6ead@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 80ba43e9f799 ("USB: core: Fix deadlock in usb_deauthorize_interface()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 80ba43e9f799cbdd83842fc27db667289b3150f5 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Tue, 12 Mar 2024 11:48:23 -0400 Subject: [PATCH] USB: core: Fix deadlock in usb_deauthorize_interface() Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219(a)gmail.com> Reported by: xingwei lee <xrivendell7(a)gmail.com> Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/linux-usb/CAEkJfYO6jRVC8Tfrd_R=cjO0hguhrV31fDPrLrNO… Fixes: 310d2b4124c0 ("usb: interface authorization: SysFS part of USB interface authorization") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/1c37eea1-9f56-4534-b9d8-b443438dc869@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index f98263e21c2a..d83231d6736a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -1217,14 +1217,24 @@ static ssize_t interface_authorized_store(struct device *dev, { struct usb_interface *intf = to_usb_interface(dev); bool val; + struct kernfs_node *kn; if (kstrtobool(buf, &val) != 0) return -EINVAL; - if (val) + if (val) { usb_authorize_interface(intf); - else - usb_deauthorize_interface(intf); + } else { + /* + * Prevent deadlock if another process is concurrently + * trying to unregister intf. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (kn) { + usb_deauthorize_interface(intf); + sysfs_unbreak_active_protection(kn); + } + } return count; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Fix deadlock in usb_deauthorize_interface()" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 80ba43e9f799cbdd83842fc27db667289b3150f5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040153-verbalize-drum-2ff0@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 80ba43e9f799 ("USB: core: Fix deadlock in usb_deauthorize_interface()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 80ba43e9f799cbdd83842fc27db667289b3150f5 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Tue, 12 Mar 2024 11:48:23 -0400 Subject: [PATCH] USB: core: Fix deadlock in usb_deauthorize_interface() Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219(a)gmail.com> Reported by: xingwei lee <xrivendell7(a)gmail.com> Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/linux-usb/CAEkJfYO6jRVC8Tfrd_R=cjO0hguhrV31fDPrLrNO… Fixes: 310d2b4124c0 ("usb: interface authorization: SysFS part of USB interface authorization") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/1c37eea1-9f56-4534-b9d8-b443438dc869@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index f98263e21c2a..d83231d6736a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -1217,14 +1217,24 @@ static ssize_t interface_authorized_store(struct device *dev, { struct usb_interface *intf = to_usb_interface(dev); bool val; + struct kernfs_node *kn; if (kstrtobool(buf, &val) != 0) return -EINVAL; - if (val) + if (val) { usb_authorize_interface(intf); - else - usb_deauthorize_interface(intf); + } else { + /* + * Prevent deadlock if another process is concurrently + * trying to unregister intf. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (kn) { + usb_deauthorize_interface(intf); + sysfs_unbreak_active_protection(kn); + } + } return count; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] USB: core: Fix deadlock in usb_deauthorize_interface()" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 80ba43e9f799cbdd83842fc27db667289b3150f5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040151-singular-unfunded-b5a8@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 80ba43e9f799 ("USB: core: Fix deadlock in usb_deauthorize_interface()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 80ba43e9f799cbdd83842fc27db667289b3150f5 Mon Sep 17 00:00:00 2001 From: Alan Stern <stern(a)rowland.harvard.edu> Date: Tue, 12 Mar 2024 11:48:23 -0400 Subject: [PATCH] USB: core: Fix deadlock in usb_deauthorize_interface() Among the attribute file callback routines in drivers/usb/core/sysfs.c, the interface_authorized_store() function is the only one which acquires a device lock on an ancestor device: It calls usb_deauthorize_interface(), which locks the interface's parent USB device. The will lead to deadlock if another process already owns that lock and tries to remove the interface, whether through a configuration change or because the device has been disconnected. As part of the removal procedure, device_del() waits for all ongoing sysfs attribute callbacks to complete. But usb_deauthorize_interface() can't complete until the device lock has been released, and the lock won't be released until the removal has finished. The mechanism provided by sysfs to prevent this kind of deadlock is to use the sysfs_break_active_protection() function, which tells sysfs not to wait for the attribute callback. Reported-and-tested by: Yue Sun <samsun1006219(a)gmail.com> Reported by: xingwei lee <xrivendell7(a)gmail.com> Signed-off-by: Alan Stern <stern(a)rowland.harvard.edu> Link: https://lore.kernel.org/linux-usb/CAEkJfYO6jRVC8Tfrd_R=cjO0hguhrV31fDPrLrNO… Fixes: 310d2b4124c0 ("usb: interface authorization: SysFS part of USB interface authorization") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/1c37eea1-9f56-4534-b9d8-b443438dc869@rowland.harv… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index f98263e21c2a..d83231d6736a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -1217,14 +1217,24 @@ static ssize_t interface_authorized_store(struct device *dev, { struct usb_interface *intf = to_usb_interface(dev); bool val; + struct kernfs_node *kn; if (kstrtobool(buf, &val) != 0) return -EINVAL; - if (val) + if (val) { usb_authorize_interface(intf); - else - usb_deauthorize_interface(intf); + } else { + /* + * Prevent deadlock if another process is concurrently + * trying to unregister intf. + */ + kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); + if (kn) { + usb_deauthorize_interface(intf); + sysfs_unbreak_active_protection(kn); + } + } return count; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] usb: dwc3: Properly set system wakeup" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x f9aa41130ac69d13a53ce2a153ca79c70d43f39c # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040103-preheated-anthology-d288@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: f9aa41130ac6 ("usb: dwc3: Properly set system wakeup") 047161686b81 ("usb: dwc3: Add remote wakeup handling") 63c4c320ccf7 ("usb: dwc3: gadget: Check for L1/L2/U3 for Start Transfer") 40edb52298df ("usb: dwc3: avoid NULL access of usb_gadget_driver") c560e76319a9 ("usb: dwc3: gadget: Fix START_TRANSFER link state check") 475e8be53d04 ("usb: dwc3: gadget: Check for disabled LPM quirk") 6f0764b5adea ("usb: dwc3: add a power supply for current control") 82c46b8ed9dc ("usb: dwc3: gadget: Introduce a DWC3 VBUS draw callback") f580170f135a ("usb: dwc3: Add splitdisable quirk for Hisilicon Kirin Soc") e81a7018d93a ("usb: dwc3: allocate gadget structure dynamically") c5a7092f4015 ("usb: dwc3: gadget: make starting isoc transfers more robust") 9af21dd6faeb ("usb: dwc3: Add support for DWC_usb32 IP") 8bb14308a869 ("usb: dwc3: core: Use role-switch default dr_mode") d0550cd20e52 ("usb: dwc3: gadget: Do link recovery for SS and SSP") d94ea5319813 ("usb: dwc3: gadget: Properly set maxpacket limit") 586f4335700f ("usb: dwc3: Fix GTXFIFOSIZ.TXFDEP macro name") 5eb5afb07853 ("usb: dwc3: use proper initializers for property entries") 9ba3aca8fe82 ("usb: dwc3: Disable phy suspend after power-on reset") a0a465569b45 ("usb: dwc3: remove generic PHY calibrate() calls") c09b73cfac2a ("usb: dwc3: don't set gadget->is_otg flag") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f9aa41130ac69d13a53ce2a153ca79c70d43f39c Mon Sep 17 00:00:00 2001 From: Thinh Nguyen <Thinh.Nguyen(a)synopsys.com> Date: Fri, 8 Mar 2024 02:40:25 +0000 Subject: [PATCH] usb: dwc3: Properly set system wakeup If the device is configured for system wakeup, then make sure that the xHCI driver knows about it and make sure to permit wakeup only at the appropriate time. For host mode, if the controller goes through the dwc3 code path, then a child xHCI platform device is created. Make sure the platform device also inherits the wakeup setting for xHCI to enable remote wakeup. For device mode, make sure to disable system wakeup if no gadget driver is bound. We may experience unwanted system wakeup due to the wakeup signal from the controller PMU detecting connection/disconnection when in low power (D3). E.g. In the case of Steam Deck, the PCI PME prevents the system staying in suspend. Cc: stable(a)vger.kernel.org Reported-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> Closes: https://lore.kernel.org/linux-usb/70a7692d-647c-9be7-00a6-06fc60f77294@igal… Fixes: d07e8819a03d ("usb: dwc3: add xHCI Host support") Signed-off-by: Thinh Nguyen <Thinh.Nguyen(a)synopsys.com> Tested-by: Sanath S <Sanath.S(a)amd.com> Tested-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> # Steam Deck Link: https://lore.kernel.org/r/667cfda7009b502e08462c8fb3f65841d103cc0a.17098654… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 3e55838c0001..31684cdaaae3 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1519,6 +1519,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) else dwc->sysdev = dwc->dev; + dwc->sys_wakeup = device_may_wakeup(dwc->sysdev); + ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name); if (ret >= 0) { dwc->usb_psy = power_supply_get_by_name(usb_psy_name); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index c07edfc954f7..7e80dd3d466b 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1133,6 +1133,7 @@ struct dwc3_scratchpad_array { * 3 - Reserved * @dis_metastability_quirk: set to disable metastability quirk. * @dis_split_quirk: set to disable split boundary. + * @sys_wakeup: set if the device may do system wakeup. * @wakeup_configured: set if the device is configured for remote wakeup. * @suspended: set to track suspend event due to U3/L2. * @imod_interval: set the interrupt moderation interval in 250ns @@ -1357,6 +1358,7 @@ struct dwc3 { unsigned dis_split_quirk:1; unsigned async_callbacks:1; + unsigned sys_wakeup:1; unsigned wakeup_configured:1; unsigned suspended:1; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 40c52dbc28d3..4df2661f6675 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2955,6 +2955,9 @@ static int dwc3_gadget_start(struct usb_gadget *g, dwc->gadget_driver = driver; spin_unlock_irqrestore(&dwc->lock, flags); + if (dwc->sys_wakeup) + device_wakeup_enable(dwc->sysdev); + return 0; } @@ -2970,6 +2973,9 @@ static int dwc3_gadget_stop(struct usb_gadget *g) struct dwc3 *dwc = gadget_to_dwc(g); unsigned long flags; + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + spin_lock_irqsave(&dwc->lock, flags); dwc->gadget_driver = NULL; dwc->max_cfg_eps = 0; @@ -4651,6 +4657,10 @@ int dwc3_gadget_init(struct dwc3 *dwc) else dwc3_gadget_set_speed(dwc->gadget, dwc->maximum_speed); + /* No system wakeup if no gadget driver bound */ + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + return 0; err5: diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index 5a5cb6ce9946..0204787df81d 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -173,6 +173,14 @@ int dwc3_host_init(struct dwc3 *dwc) goto err; } + if (dwc->sys_wakeup) { + /* Restore wakeup setting if switched from device */ + device_wakeup_enable(dwc->sysdev); + + /* Pass on wakeup setting to the new xhci platform device */ + device_init_wakeup(&xhci->dev, true); + } + return 0; err: platform_device_put(xhci); @@ -181,6 +189,9 @@ int dwc3_host_init(struct dwc3 *dwc) void dwc3_host_exit(struct dwc3 *dwc) { + if (dwc->sys_wakeup) + device_init_wakeup(&dwc->xhci->dev, false); + platform_device_unregister(dwc->xhci); dwc->xhci = NULL; }

8 months, 3 weeks

1
0
0 0

FAILED: patch "[PATCH] usb: dwc3: Properly set system wakeup" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x f9aa41130ac69d13a53ce2a153ca79c70d43f39c # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024040102-flatterer-enslave-672e@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: f9aa41130ac6 ("usb: dwc3: Properly set system wakeup") 047161686b81 ("usb: dwc3: Add remote wakeup handling") 63c4c320ccf7 ("usb: dwc3: gadget: Check for L1/L2/U3 for Start Transfer") 40edb52298df ("usb: dwc3: avoid NULL access of usb_gadget_driver") c560e76319a9 ("usb: dwc3: gadget: Fix START_TRANSFER link state check") 475e8be53d04 ("usb: dwc3: gadget: Check for disabled LPM quirk") 6f0764b5adea ("usb: dwc3: add a power supply for current control") 82c46b8ed9dc ("usb: dwc3: gadget: Introduce a DWC3 VBUS draw callback") f580170f135a ("usb: dwc3: Add splitdisable quirk for Hisilicon Kirin Soc") e81a7018d93a ("usb: dwc3: allocate gadget structure dynamically") c5a7092f4015 ("usb: dwc3: gadget: make starting isoc transfers more robust") 9af21dd6faeb ("usb: dwc3: Add support for DWC_usb32 IP") 8bb14308a869 ("usb: dwc3: core: Use role-switch default dr_mode") d0550cd20e52 ("usb: dwc3: gadget: Do link recovery for SS and SSP") d94ea5319813 ("usb: dwc3: gadget: Properly set maxpacket limit") 586f4335700f ("usb: dwc3: Fix GTXFIFOSIZ.TXFDEP macro name") 5eb5afb07853 ("usb: dwc3: use proper initializers for property entries") 9ba3aca8fe82 ("usb: dwc3: Disable phy suspend after power-on reset") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f9aa41130ac69d13a53ce2a153ca79c70d43f39c Mon Sep 17 00:00:00 2001 From: Thinh Nguyen <Thinh.Nguyen(a)synopsys.com> Date: Fri, 8 Mar 2024 02:40:25 +0000 Subject: [PATCH] usb: dwc3: Properly set system wakeup If the device is configured for system wakeup, then make sure that the xHCI driver knows about it and make sure to permit wakeup only at the appropriate time. For host mode, if the controller goes through the dwc3 code path, then a child xHCI platform device is created. Make sure the platform device also inherits the wakeup setting for xHCI to enable remote wakeup. For device mode, make sure to disable system wakeup if no gadget driver is bound. We may experience unwanted system wakeup due to the wakeup signal from the controller PMU detecting connection/disconnection when in low power (D3). E.g. In the case of Steam Deck, the PCI PME prevents the system staying in suspend. Cc: stable(a)vger.kernel.org Reported-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> Closes: https://lore.kernel.org/linux-usb/70a7692d-647c-9be7-00a6-06fc60f77294@igal… Fixes: d07e8819a03d ("usb: dwc3: add xHCI Host support") Signed-off-by: Thinh Nguyen <Thinh.Nguyen(a)synopsys.com> Tested-by: Sanath S <Sanath.S(a)amd.com> Tested-by: Guilherme G. Piccoli <gpiccoli(a)igalia.com> # Steam Deck Link: https://lore.kernel.org/r/667cfda7009b502e08462c8fb3f65841d103cc0a.17098654… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 3e55838c0001..31684cdaaae3 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1519,6 +1519,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) else dwc->sysdev = dwc->dev; + dwc->sys_wakeup = device_may_wakeup(dwc->sysdev); + ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name); if (ret >= 0) { dwc->usb_psy = power_supply_get_by_name(usb_psy_name); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index c07edfc954f7..7e80dd3d466b 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -1133,6 +1133,7 @@ struct dwc3_scratchpad_array { * 3 - Reserved * @dis_metastability_quirk: set to disable metastability quirk. * @dis_split_quirk: set to disable split boundary. + * @sys_wakeup: set if the device may do system wakeup. * @wakeup_configured: set if the device is configured for remote wakeup. * @suspended: set to track suspend event due to U3/L2. * @imod_interval: set the interrupt moderation interval in 250ns @@ -1357,6 +1358,7 @@ struct dwc3 { unsigned dis_split_quirk:1; unsigned async_callbacks:1; + unsigned sys_wakeup:1; unsigned wakeup_configured:1; unsigned suspended:1; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 40c52dbc28d3..4df2661f6675 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2955,6 +2955,9 @@ static int dwc3_gadget_start(struct usb_gadget *g, dwc->gadget_driver = driver; spin_unlock_irqrestore(&dwc->lock, flags); + if (dwc->sys_wakeup) + device_wakeup_enable(dwc->sysdev); + return 0; } @@ -2970,6 +2973,9 @@ static int dwc3_gadget_stop(struct usb_gadget *g) struct dwc3 *dwc = gadget_to_dwc(g); unsigned long flags; + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + spin_lock_irqsave(&dwc->lock, flags); dwc->gadget_driver = NULL; dwc->max_cfg_eps = 0; @@ -4651,6 +4657,10 @@ int dwc3_gadget_init(struct dwc3 *dwc) else dwc3_gadget_set_speed(dwc->gadget, dwc->maximum_speed); + /* No system wakeup if no gadget driver bound */ + if (dwc->sys_wakeup) + device_wakeup_disable(dwc->sysdev); + return 0; err5: diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index 5a5cb6ce9946..0204787df81d 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -173,6 +173,14 @@ int dwc3_host_init(struct dwc3 *dwc) goto err; } + if (dwc->sys_wakeup) { + /* Restore wakeup setting if switched from device */ + device_wakeup_enable(dwc->sysdev); + + /* Pass on wakeup setting to the new xhci platform device */ + device_init_wakeup(&xhci->dev, true); + } + return 0; err: platform_device_put(xhci); @@ -181,6 +189,9 @@ int dwc3_host_init(struct dwc3 *dwc) void dwc3_host_exit(struct dwc3 *dwc) { + if (dwc->sys_wakeup) + device_init_wakeup(&dwc->xhci->dev, false); + platform_device_unregister(dwc->xhci); dwc->xhci = NULL; }

8 months, 3 weeks

1
0
0 0

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror April 2024