April 2020 - Linux-stable-mirror

patch "Revert "serial: uartps: Fix error path when alloc failed"" added to tty-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "serial: uartps: Fix error path when alloc failed" to my tty git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git in the tty-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From b6fd2dbbd649b89a3998528994665ded1e3fbf7f Mon Sep 17 00:00:00 2001 From: Michal Simek <michal.simek(a)xilinx.com> Date: Fri, 3 Apr 2020 11:24:32 +0200 Subject: Revert "serial: uartps: Fix error path when alloc failed" This reverts commit 32cf21ac4edd6c0d5b9614368a83bcdc68acb031. As Johan says, this driver needs a lot more work and these changes are only going in the wrong direction: https://lkml.kernel.org/r/20190523091839.GC568@localhost Reported-by: Johan Hovold <johan(a)kernel.org> Signed-off-by: Michal Simek <michal.simek(a)xilinx.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/46cd7f039db847c08baa6508edd7854f7c8ff80f.15859058… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/tty/serial/xilinx_uartps.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 4e3fefa70b56..412bfc51f546 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1542,10 +1542,8 @@ static int cdns_uart_probe(struct platform_device *pdev) #ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE cdns_uart_console = devm_kzalloc(&pdev->dev, sizeof(*cdns_uart_console), GFP_KERNEL); - if (!cdns_uart_console) { - rc = -ENOMEM; - goto err_out_id; - } + if (!cdns_uart_console) + return -ENOMEM; strncpy(cdns_uart_console->name, CDNS_UART_TTY_NAME, sizeof(cdns_uart_console->name)); -- 2.26.1

4 years, 8 months

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patch "Revert "serial: uartps: Do not allow use aliases >=" added to tty-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "serial: uartps: Do not allow use aliases >= to my tty git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git in the tty-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 91c9dfa25c7f95b543c280e0edf1fd8de6e90985 Mon Sep 17 00:00:00 2001 From: Michal Simek <michal.simek(a)xilinx.com> Date: Fri, 3 Apr 2020 11:24:33 +0200 Subject: Revert "serial: uartps: Do not allow use aliases >= MAX_UART_INSTANCES" This reverts commit 2088cfd882d0403609bdf426e9b24372fe1b8337. As Johan says, this driver needs a lot more work and these changes are only going in the wrong direction: https://lkml.kernel.org/r/20190523091839.GC568@localhost Reported-by: Johan Hovold <johan(a)kernel.org> Signed-off-by: Michal Simek <michal.simek(a)xilinx.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/dac3898e3e32d963f357fb436ac9a7ac3cbcf933.15859058… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/tty/serial/xilinx_uartps.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 412bfc51f546..9db3cd120057 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1712,8 +1712,7 @@ static int cdns_uart_probe(struct platform_device *pdev) uart_unregister_driver(cdns_uart_data->cdns_uart_driver); err_out_id: mutex_lock(&bitmap_lock); - if (cdns_uart_data->id < MAX_UART_INSTANCES) - clear_bit(cdns_uart_data->id, bitmap); + clear_bit(cdns_uart_data->id, bitmap); mutex_unlock(&bitmap_lock); return rc; } @@ -1738,8 +1737,7 @@ static int cdns_uart_remove(struct platform_device *pdev) rc = uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port); port->mapbase = 0; mutex_lock(&bitmap_lock); - if (cdns_uart_data->id < MAX_UART_INSTANCES) - clear_bit(cdns_uart_data->id, bitmap); + clear_bit(cdns_uart_data->id, bitmap); mutex_unlock(&bitmap_lock); clk_disable_unprepare(cdns_uart_data->uartclk); clk_disable_unprepare(cdns_uart_data->pclk); -- 2.26.1

4 years, 8 months

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patch "Revert "serial: uartps: Use the same dynamic major number for all" added to tty-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "serial: uartps: Use the same dynamic major number for all to my tty git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git in the tty-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 8da1a3940da4b0e82848ec29b835486890bc9232 Mon Sep 17 00:00:00 2001 From: Michal Simek <michal.simek(a)xilinx.com> Date: Fri, 3 Apr 2020 11:24:31 +0200 Subject: Revert "serial: uartps: Use the same dynamic major number for all ports" This reverts commit ab262666018de6f4e206b021386b93ed0c164316. As Johan says, this driver needs a lot more work and these changes are only going in the wrong direction: https://lkml.kernel.org/r/20190523091839.GC568@localhost Reported-by: Johan Hovold <johan(a)kernel.org> Signed-off-by: Michal Simek <michal.simek(a)xilinx.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/14a565fc1e14a5ec6cc6a6710deb878ae8305f22.15859058… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/tty/serial/xilinx_uartps.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index b858fb14833d..4e3fefa70b56 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -26,13 +26,13 @@ #define CDNS_UART_TTY_NAME "ttyPS" #define CDNS_UART_NAME "xuartps" +#define CDNS_UART_MAJOR 0 /* use dynamic node allocation */ #define CDNS_UART_FIFO_SIZE 64 /* FIFO size */ #define CDNS_UART_REGISTER_SPACE 0x1000 #define TX_TIMEOUT 500000 /* Rx Trigger level */ static int rx_trigger_level = 56; -static int uartps_major; module_param(rx_trigger_level, uint, 0444); MODULE_PARM_DESC(rx_trigger_level, "Rx trigger level, 1-63 bytes"); @@ -1535,7 +1535,7 @@ static int cdns_uart_probe(struct platform_device *pdev) cdns_uart_uart_driver->owner = THIS_MODULE; cdns_uart_uart_driver->driver_name = driver_name; cdns_uart_uart_driver->dev_name = CDNS_UART_TTY_NAME; - cdns_uart_uart_driver->major = uartps_major; + cdns_uart_uart_driver->major = CDNS_UART_MAJOR; cdns_uart_uart_driver->minor = cdns_uart_data->id; cdns_uart_uart_driver->nr = 1; @@ -1564,7 +1564,6 @@ static int cdns_uart_probe(struct platform_device *pdev) goto err_out_id; } - uartps_major = cdns_uart_uart_driver->tty_driver->major; cdns_uart_data->cdns_uart_driver = cdns_uart_uart_driver; /* -- 2.26.1

4 years, 8 months

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patch "Revert "serial: uartps: Fix uartps_major handling"" added to tty-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled Revert "serial: uartps: Fix uartps_major handling" to my tty git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git in the tty-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 2e01911b7cf7aa07a304a809eca1b11a4bd35859 Mon Sep 17 00:00:00 2001 From: Michal Simek <michal.simek(a)xilinx.com> Date: Fri, 3 Apr 2020 11:24:30 +0200 Subject: Revert "serial: uartps: Fix uartps_major handling" This reverts commit 5e9bd2d70ae7c00a95a22994abf1eef728649e64. As Johan says, this driver needs a lot more work and these changes are only going in the wrong direction: https://lkml.kernel.org/r/20190523091839.GC568@localhost Reported-by: Johan Hovold <johan(a)kernel.org> Signed-off-by: Michal Simek <michal.simek(a)xilinx.com> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/310999ab5342f788a7bc1b0e68294d4f052cad07.15859058… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/tty/serial/xilinx_uartps.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 6b26f767768e..b858fb14833d 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1564,6 +1564,7 @@ static int cdns_uart_probe(struct platform_device *pdev) goto err_out_id; } + uartps_major = cdns_uart_uart_driver->tty_driver->major; cdns_uart_data->cdns_uart_driver = cdns_uart_uart_driver; /* @@ -1694,7 +1695,6 @@ static int cdns_uart_probe(struct platform_device *pdev) console_port = NULL; #endif - uartps_major = cdns_uart_uart_driver->tty_driver->major; cdns_uart_data->cts_override = of_property_read_bool(pdev->dev.of_node, "cts-override"); return 0; @@ -1756,12 +1756,6 @@ static int cdns_uart_remove(struct platform_device *pdev) console_port = NULL; #endif - /* If this is last instance major number should be initialized */ - mutex_lock(&bitmap_lock); - if (bitmap_empty(bitmap, MAX_UART_INSTANCES)) - uartps_major = 0; - mutex_unlock(&bitmap_lock); - uart_unregister_driver(cdns_uart_data->cdns_uart_driver); return rc; } -- 2.26.1

4 years, 8 months

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patch "USB: Add USB_QUIRK_DELAY_CTRL_MSG and USB_QUIRK_DELAY_INIT for" added to usb-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled USB: Add USB_QUIRK_DELAY_CTRL_MSG and USB_QUIRK_DELAY_INIT for to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From be34a5854b4606bd7a160ad3cb43415d623596c7 Mon Sep 17 00:00:00 2001 From: Jonathan Cox <jonathan(a)jdcox.net> Date: Fri, 10 Apr 2020 14:24:27 -0700 Subject: USB: Add USB_QUIRK_DELAY_CTRL_MSG and USB_QUIRK_DELAY_INIT for Corsair K70 RGB RAPIDFIRE The Corsair K70 RGB RAPIDFIRE needs the USB_QUIRK_DELAY_INIT and USB_QUIRK_DELAY_CTRL_MSG to function or it will randomly not respond on boot, just like other Corsair keyboards Signed-off-by: Jonathan Cox <jonathan(a)jdcox.net> Cc: stable <stable(a)vger.kernel.org> Link: https://lore.kernel.org/r/20200410212427.2886-1-jonathan@jdcox.net Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index da30b5664ff3..3e8efe759c3e 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -430,6 +430,10 @@ static const struct usb_device_id usb_quirk_list[] = { /* Corsair K70 LUX */ { USB_DEVICE(0x1b1c, 0x1b36), .driver_info = USB_QUIRK_DELAY_INIT }, + /* Corsair K70 RGB RAPDIFIRE */ + { USB_DEVICE(0x1b1c, 0x1b38), .driver_info = USB_QUIRK_DELAY_INIT | + USB_QUIRK_DELAY_CTRL_MSG }, + /* MIDI keyboard WORLDE MINI */ { USB_DEVICE(0x1c75, 0x0204), .driver_info = USB_QUIRK_CONFIG_INTF_STRINGS }, -- 2.26.1

4 years, 8 months

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[PATCH] tpm/tpm_tis: Free IRQ if probing fails

by Jarkko Sakkinen

Call devm_free_irq() if we have to revert to polling in order not to unnecessarily reserve the IRQ for the life-cycle of the driver. Cc: stable(a)vger.kernel.org # 4.5.x Reported-by: Hans de Goede <hdegoede(a)redhat.com> Fixes: e3837e74a06d ("tpm_tis: Refactor the interrupt setup") Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen(a)linux.intel.com> --- drivers/char/tpm/tpm_tis_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 27c6ca031e23..ae6868e7b696 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1062,9 +1062,12 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, if (irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, irq); - if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) + if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) { dev_err(&chip->dev, FW_BUG "TPM interrupt not working, polling instead\n"); + devm_free_irq(chip->dev.parent, priv->irq, + chip); + } } else { tpm_tis_probe_irq(chip, intmask); } -- 2.25.1

4 years, 8 months

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[PATCH AUTOSEL 5.5 01/66] ALSA: hda: do not override bus codec_mask in link_get()

by Sasha Levin

From: Kai Vehmanen <kai.vehmanen(a)linux.intel.com> [ Upstream commit 43bcb1c0507858cdc95e425017dcc33f8105df39 ] snd_hdac_ext_bus_link_get() does not work correctly in case there are multiple codecs on the bus. It unconditionally resets the bus->codec_mask value. As per documentation in hdaudio.h and existing use in client code, this field should be used to store bit flag of detected codecs on the bus. By overwriting value of the codec_mask, information on all detected codecs is lost. No current user of hdac is impacted, but use of bus->codec_mask is planned in future patches for SOF. Signed-off-by: Kai Vehmanen <kai.vehmanen(a)linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan(a)linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> Reviewed-by: Takashi Iwai <tiwai(a)suse.de> Link: https://lore.kernel.org/r/20200206200223.7715-1-kai.vehmanen@linux.intel.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- sound/hda/ext/hdac_ext_controller.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index cfab60d88c921..09ff209df4a30 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -254,6 +254,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all); int snd_hdac_ext_bus_link_get(struct hdac_bus *bus, struct hdac_ext_link *link) { + unsigned long codec_mask; int ret = 0; mutex_lock(&bus->lock); @@ -280,9 +281,11 @@ int snd_hdac_ext_bus_link_get(struct hdac_bus *bus, * HDA spec section 4.3 - Codec Discovery */ udelay(521); - bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS); - dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask); - snd_hdac_chip_writew(bus, STATESTS, bus->codec_mask); + codec_mask = snd_hdac_chip_readw(bus, STATESTS); + dev_dbg(bus->dev, "codec_mask = 0x%lx\n", codec_mask); + snd_hdac_chip_writew(bus, STATESTS, codec_mask); + if (!bus->codec_mask) + bus->codec_mask = codec_mask; } mutex_unlock(&bus->lock); -- 2.20.1

4 years, 8 months

3
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FAILED: patch "[PATCH] btrfs: handle logged extent failure properly" failed to apply to 5.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.6-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>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ab9b2c7b32e6be53cac2e23f5b2db66815a7d972 Mon Sep 17 00:00:00 2001 From: Josef Bacik <josef(a)toxicpanda.com> Date: Thu, 13 Feb 2020 10:47:30 -0500 Subject: [PATCH] btrfs: handle logged extent failure properly If we're allocating a logged extent we attempt to insert an extent record for the file extent directly. We increase space_info->bytes_reserved, because the extent entry addition will call btrfs_update_block_group(), which will convert the ->bytes_reserved to ->bytes_used. However if we fail at any point while inserting the extent entry we will bail and leave space on ->bytes_reserved, which will trigger a WARN_ON() on umount. Fix this by pinning the space if we fail to insert, which is what happens in every other failure case that involves adding the extent entry. CC: stable(a)vger.kernel.org # 5.4+ Reviewed-by: Johannes Thumshirn <johannes.thumshirn(a)wdc.com> Reviewed-by: Nikolay Borisov <nborisov(a)suse.com> Reviewed-by: Qu Wenruo <wqu(a)suse.com> Signed-off-by: Josef Bacik <josef(a)toxicpanda.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 136fffb76428..7eef91d6c2b6 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4422,7 +4422,7 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, ret = alloc_reserved_file_extent(trans, 0, root_objectid, 0, owner, offset, ins, 1); if (ret) - btrfs_pin_extent(fs_info, ins->objectid, ins->offset, 1); + btrfs_pin_extent(trans, ins->objectid, ins->offset, 1); btrfs_put_block_group(block_group); return ret; }

4 years, 8 months

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patch "usb: typec: tcpm: Ignore CC and vbus changes in PORT_RESET change" added to usb-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled usb: typec: tcpm: Ignore CC and vbus changes in PORT_RESET change to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 901789745a053286e0ced37960d44fa60267b940 Mon Sep 17 00:00:00 2001 From: Badhri Jagan Sridharan <badhri(a)google.com> Date: Thu, 2 Apr 2020 14:59:47 -0700 Subject: usb: typec: tcpm: Ignore CC and vbus changes in PORT_RESET change After PORT_RESET, the port is set to the appropriate default_state. Ignore processing CC changes here as this could cause the port to be switched into sink states by default. echo source > /sys/class/typec/port0/port_type Before: [ 154.528547] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [ 154.528560] CC1: 0 -> 0, CC2: 3 -> 0 [state PORT_RESET, polarity 0, disconnected] [ 154.528564] state change PORT_RESET -> SNK_UNATTACHED After: [ 151.068814] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev3 NONE_AMS] [ 151.072440] CC1: 3 -> 0, CC2: 0 -> 0 [state PORT_RESET, polarity 0, disconnected] [ 151.172117] state change PORT_RESET -> PORT_RESET_WAIT_OFF [delayed 100 ms] [ 151.172136] pending state change PORT_RESET_WAIT_OFF -> SRC_UNATTACHED @ 870 ms [rev3 NONE_AMS] [ 152.060106] state change PORT_RESET_WAIT_OFF -> SRC_UNATTACHED [delayed 870 ms] [ 152.060118] Start toggling Signed-off-by: Badhri Jagan Sridharan <badhri(a)google.com> Cc: stable <stable(a)vger.kernel.org> Reviewed-by: Heikki Krogerus <heikki.krogerus(a)linux.intel.com> Reviewed-by: Guenter Roeck <linux(a)roeck-us.net> Link: https://lore.kernel.org/r/20200402215947.176577-1-badhri@google.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/typec/tcpm/tcpm.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index de3576e6530a..82b19ebd7838 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -3794,6 +3794,14 @@ static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1, */ break; + case PORT_RESET: + case PORT_RESET_WAIT_OFF: + /* + * State set back to default mode once the timer completes. + * Ignore CC changes here. + */ + break; + default: if (tcpm_port_is_disconnected(port)) tcpm_set_state(port, unattached_state(port), 0); @@ -3855,6 +3863,15 @@ static void _tcpm_pd_vbus_on(struct tcpm_port *port) case SRC_TRY_DEBOUNCE: /* Do nothing, waiting for sink detection */ break; + + case PORT_RESET: + case PORT_RESET_WAIT_OFF: + /* + * State set back to default mode once the timer completes. + * Ignore vbus changes here. + */ + break; + default: break; } @@ -3908,10 +3925,19 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port) case PORT_RESET_WAIT_OFF: tcpm_set_state(port, tcpm_default_state(port), 0); break; + case SRC_TRY_WAIT: case SRC_TRY_DEBOUNCE: /* Do nothing, waiting for sink detection */ break; + + case PORT_RESET: + /* + * State set back to default mode once the timer completes. + * Ignore vbus changes here. + */ + break; + default: if (port->pwr_role == TYPEC_SINK && port->attached) -- 2.26.1

4 years, 8 months

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patch "cdc-acm: introduce a cool down" added to usb-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled cdc-acm: introduce a cool down to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From a4e7279cd1d19f48f0af2a10ed020febaa9ac092 Mon Sep 17 00:00:00 2001 From: Oliver Neukum <oneukum(a)suse.com> Date: Wed, 15 Apr 2020 17:13:58 +0200 Subject: cdc-acm: introduce a cool down Immediate submission in case of a babbling device can lead to a busy loop. Introducing a delayed work. Signed-off-by: Oliver Neukum <oneukum(a)suse.com> Cc: stable <stable(a)vger.kernel.org> Tested-by: Jonas Karlsson <jonas.karlsson(a)actia.se> Link: https://lore.kernel.org/r/20200415151358.32664-2-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/usb/class/cdc-acm.c | 30 ++++++++++++++++++++++++++++-- drivers/usb/class/cdc-acm.h | 5 ++++- 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 4ef68e6671aa..ded8d93834ca 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -412,9 +412,12 @@ static void acm_ctrl_irq(struct urb *urb) exit: retval = usb_submit_urb(urb, GFP_ATOMIC); - if (retval && retval != -EPERM) + if (retval && retval != -EPERM && retval != -ENODEV) dev_err(&acm->control->dev, "%s - usb_submit_urb failed: %d\n", __func__, retval); + else + dev_vdbg(&acm->control->dev, + "control resubmission terminated %d\n", retval); } static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) @@ -430,6 +433,8 @@ static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) dev_err(&acm->data->dev, "urb %d failed submission with %d\n", index, res); + } else { + dev_vdbg(&acm->data->dev, "intended failure %d\n", res); } set_bit(index, &acm->read_urbs_free); return res; @@ -471,6 +476,7 @@ static void acm_read_bulk_callback(struct urb *urb) int status = urb->status; bool stopped = false; bool stalled = false; + bool cooldown = false; dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", rb->index, urb->actual_length, status); @@ -497,6 +503,14 @@ static void acm_read_bulk_callback(struct urb *urb) __func__, status); stopped = true; break; + case -EOVERFLOW: + case -EPROTO: + dev_dbg(&acm->data->dev, + "%s - cooling babbling device\n", __func__); + usb_mark_last_busy(acm->dev); + set_bit(rb->index, &acm->urbs_in_error_delay); + cooldown = true; + break; default: dev_dbg(&acm->data->dev, "%s - nonzero urb status received: %d\n", @@ -518,9 +532,11 @@ static void acm_read_bulk_callback(struct urb *urb) */ smp_mb__after_atomic(); - if (stopped || stalled) { + if (stopped || stalled || cooldown) { if (stalled) schedule_work(&acm->work); + else if (cooldown) + schedule_delayed_work(&acm->dwork, HZ / 2); return; } @@ -567,6 +583,12 @@ static void acm_softint(struct work_struct *work) } } + if (test_and_clear_bit(ACM_ERROR_DELAY, &acm->flags)) { + for (i = 0; i < ACM_NR; i++) + if (test_and_clear_bit(i, &acm->urbs_in_error_delay)) + acm_submit_read_urb(acm, i, GFP_NOIO); + } + if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) tty_port_tty_wakeup(&acm->port); } @@ -1333,6 +1355,7 @@ static int acm_probe(struct usb_interface *intf, acm->readsize = readsize; acm->rx_buflimit = num_rx_buf; INIT_WORK(&acm->work, acm_softint); + INIT_DELAYED_WORK(&acm->dwork, acm_softint); init_waitqueue_head(&acm->wioctl); spin_lock_init(&acm->write_lock); spin_lock_init(&acm->read_lock); @@ -1542,6 +1565,7 @@ static void acm_disconnect(struct usb_interface *intf) acm_kill_urbs(acm); cancel_work_sync(&acm->work); + cancel_delayed_work_sync(&acm->dwork); tty_unregister_device(acm_tty_driver, acm->minor); @@ -1584,6 +1608,8 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message) acm_kill_urbs(acm); cancel_work_sync(&acm->work); + cancel_delayed_work_sync(&acm->dwork); + acm->urbs_in_error_delay = 0; return 0; } diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h index ca1c026382c2..cd5e9d8ab237 100644 --- a/drivers/usb/class/cdc-acm.h +++ b/drivers/usb/class/cdc-acm.h @@ -109,8 +109,11 @@ struct acm { # define EVENT_TTY_WAKEUP 0 # define EVENT_RX_STALL 1 # define ACM_THROTTLED 2 +# define ACM_ERROR_DELAY 3 + unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */ struct usb_cdc_line_coding line; /* bits, stop, parity */ - struct work_struct work; /* work queue entry for line discipline waking up */ + struct work_struct work; /* work queue entry for various purposes*/ + struct delayed_work dwork; /* for cool downs needed in error recovery */ unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ unsigned int ctrlout; /* output control lines (DTR, RTS) */ struct async_icount iocount; /* counters for control line changes */ -- 2.26.1

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Linux-stable-mirror April 2020