greybus-dev February 2026

greybus-dev@lists.linaro.org

9 participants
19 discussions

[PATCH] staging: greybus: remove unused apb_ctrl_fw_flashing() and apb_ctrl_standby_boot()

by Bruno Martins

These functions were left behind when commit 921dbe52b40b ("greybus: arche-platform: Add support for SPI bus sharing for Mihi") removed their only callers in 2016. Signed-off-by: Bruno Martins <ehanoc(a)protonmail.com> --- drivers/staging/greybus/arche-apb-ctrl.c | 10 ---------- drivers/staging/greybus/arche_platform.h | 2 -- 2 files changed, 12 deletions(-) diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c index 90ab32638d3f..6a50b79bb787 100644 --- a/drivers/staging/greybus/arche-apb-ctrl.c +++ b/drivers/staging/greybus/arche-apb-ctrl.c @@ -230,16 +230,6 @@ int apb_ctrl_coldboot(struct device *dev) return coldboot_seq(to_platform_device(dev)); } -int apb_ctrl_fw_flashing(struct device *dev) -{ - return fw_flashing_seq(to_platform_device(dev)); -} - -int apb_ctrl_standby_boot(struct device *dev) -{ - return standby_boot_seq(to_platform_device(dev)); -} - void apb_ctrl_poweroff(struct device *dev) { poweroff_seq(to_platform_device(dev)); diff --git a/drivers/staging/greybus/arche_platform.h b/drivers/staging/greybus/arche_platform.h index 9d997f2d6517..5d0692af2533 100644 --- a/drivers/staging/greybus/arche_platform.h +++ b/drivers/staging/greybus/arche_platform.h @@ -21,8 +21,6 @@ void __exit arche_apb_exit(void); /* Operational states for the APB device */ int apb_ctrl_coldboot(struct device *dev); -int apb_ctrl_fw_flashing(struct device *dev); -int apb_ctrl_standby_boot(struct device *dev); void apb_ctrl_poweroff(struct device *dev); #endif /* __ARCHE_PLATFORM_H */ -- 2.47.3

20 hours, 51 minutes

[PATCH v3 1/4] staging: greybus: added comment to mutex declaration in fw-management.c

by Rachit Dhar

Added comment to mutex declaration, to resolve a checkpatch.pl check. Signed-off-by: Rachit Dhar <rchtdhr(a)gmail.com> --- drivers/staging/greybus/fw-management.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/fw-management.c b/drivers/staging/greybus/fw-management.c index 152949c23d65..07a0e6b63cf3 100644 --- a/drivers/staging/greybus/fw-management.c +++ b/drivers/staging/greybus/fw-management.c @@ -28,7 +28,7 @@ struct fw_mgmt { /* Common id-map for interface and backend firmware requests */ struct ida id_map; - struct mutex mutex; + struct mutex mutex; /* protects fw_mgmt->disabled, and serializes ioctl */ struct completion completion; struct cdev cdev; struct device *class_device; -- 2.43.0

22 hours, 22 minutes

[PATCH v3 2/4] staging: greybus: fixed styling issue in fw-management.c

by Rachit Dhar

Fixed a styling issue highlighted by checkpatch.pl. Signed-off-by: Rachit Dhar <rchtdhr(a)gmail.com> --- drivers/staging/greybus/fw-management.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/greybus/fw-management.c b/drivers/staging/greybus/fw-management.c index 07a0e6b63cf3..cf917ddb79c4 100644 --- a/drivers/staging/greybus/fw-management.c +++ b/drivers/staging/greybus/fw-management.c @@ -434,7 +434,8 @@ static int fw_mgmt_ioctl(struct fw_mgmt *fw_mgmt, unsigned int cmd, return -EFAULT; ret = fw_mgmt_load_and_validate_operation(fw_mgmt, - intf_load.load_method, intf_load.firmware_tag); + intf_load.load_method, + intf_load.firmware_tag); if (ret) return ret; -- 2.43.0

22 hours, 23 minutes

[PATCH v3] [PATCH v3] staging: greybus: gbphy: Replace sprintf() with sysfs_emit()

by Neel Bullywon

Replace sprintf() with sysfs_emit() in the protocol_id_show() sysfs attribute function. This code is safe as-is, but replace sprintf() with sysfs_emit() because we are trying to get rid of calls to sprintf() as part of kernel hardening; sysfs_emit() is more appropriate in this context. Signed-off-by: Neel Bullywon <neelb2403(a)gmail.com> --- This was compile-tested only (no VM/hardware used) Changes in v2: - Subject: change to imperative "Replace" (was "Replaced"). - Wording and line breaks adjusted in the commit body for clarity. Changes in v3: - Clarify what "safe" means (buffer is PAGE_SIZE) per Dan Carpenter's suggestion. - Reflow lines to avoid awkward breaks. --- drivers/staging/greybus/gbphy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c index 60cf09a302a7..55f132b09cee 100644 --- a/drivers/staging/greybus/gbphy.c +++ b/drivers/staging/greybus/gbphy.c @@ -31,7 +31,7 @@ static ssize_t protocol_id_show(struct device *dev, { struct gbphy_device *gbphy_dev = to_gbphy_dev(dev); - return sprintf(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); + return sysfs_emit(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); } static DEVICE_ATTR_RO(protocol_id); base-commit: de0674d9bc69699c497477d45172493393ae9007 -- 2.44.0

22 hours, 24 minutes

[PATCH] staging: greybus: uart: migrated from IDR to XArray API

by Neel Bullywon

Replaced the IDR API with the XArray API for managing TTY minor numbers. This addresses the checkpatch warning about DEFINE_IDR being deprecated. Following changes include: - Replaced DEFINE_IDR with DEFINE_XARRAY_ALLOC - Replace idr_find with xa_load - Replace idr_alloc with xa_alloc - Replace idr_remove with xa_erase - Replace idr_destroy with xa_destroy - Updated the include to use xarray No core functional changes, just modernized the code to a new API. Signed-off-by: Neel Bullywon <neelb2403(a)gmail.com> --- drivers/staging/greybus/uart.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 5cece0a6606f..8bd6bf0a57a8 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -22,7 +22,7 @@ #include <linux/serial.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> -#include <linux/idr.h> +#include <linux/xarray.h> #include <linux/fs.h> #include <linux/kdev_t.h> #include <linux/kfifo.h> @@ -67,7 +67,7 @@ struct gb_tty { }; static struct tty_driver *gb_tty_driver; -static DEFINE_IDR(tty_minors); +static DEFINE_XARRAY_ALLOC(tty_minors); static DEFINE_MUTEX(table_lock); static int gb_uart_receive_data_handler(struct gb_operation *op) @@ -342,7 +342,7 @@ static struct gb_tty *get_gb_by_minor(unsigned int minor) struct gb_tty *gb_tty; mutex_lock(&table_lock); - gb_tty = idr_find(&tty_minors, minor); + gb_tty = xa_load(&tty_minors, minor); if (gb_tty) { mutex_lock(&gb_tty->mutex); if (gb_tty->disconnected) { @@ -362,7 +362,7 @@ static int alloc_minor(struct gb_tty *gb_tty) int minor; mutex_lock(&table_lock); - minor = idr_alloc(&tty_minors, gb_tty, 0, GB_NUM_MINORS, GFP_KERNEL); + minor = xa_alloc(&tty_minors, &minor, gb_tty, XA_LIMIT(0, GB_NUM_MINORS - 1), GFP_KERNEL); mutex_unlock(&table_lock); if (minor >= 0) gb_tty->minor = minor; @@ -375,7 +375,7 @@ static void release_minor(struct gb_tty *gb_tty) gb_tty->minor = 0; /* Maybe should use an invalid value instead */ mutex_lock(&table_lock); - idr_remove(&tty_minors, minor); + xa_erase(&tty_minors, minor); mutex_unlock(&table_lock); } @@ -984,7 +984,7 @@ static void gb_tty_exit(void) { tty_unregister_driver(gb_tty_driver); tty_driver_kref_put(gb_tty_driver); - idr_destroy(&tty_minors); + xa_destroy(&tty_minors); } static const struct gbphy_device_id gb_uart_id_table[] = { -- 2.44.0

22 hours, 36 minutes

[PATCH v3 4/4] staging: greybus: resolved checkpatch checks for light.c

by Rachit Dhar

Added comment to mutex declarations, to resolve checkpatch.pl checks. Signed-off-by: Rachit Dhar <rchtdhr(a)gmail.com> --- drivers/staging/greybus/light.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c index e509fdc715db..1f2faa6d545d 100644 --- a/drivers/staging/greybus/light.c +++ b/drivers/staging/greybus/light.c @@ -37,7 +37,7 @@ struct gb_channel { bool releasing; bool strobe_state; bool active; - struct mutex lock; + struct mutex lock; /* protects gb_channel->active */ }; struct gb_light { @@ -59,7 +59,7 @@ struct gb_lights { struct gb_connection *connection; u8 lights_count; struct gb_light *lights; - struct mutex lights_lock; + struct mutex lights_lock; /* protects gb_lights->lights */ }; static void gb_lights_channel_free(struct gb_channel *channel); -- 2.43.0

3 days, 2 hours

[PATCH v3 3/4] staging: greybus: resolved checkpatch checks for raw.c

by Rachit Dhar

Added comment to mutex declaration, to resolve checkpatch.pl check. Signed-off-by: Rachit Dhar <rchtdhr(a)gmail.com> --- drivers/staging/greybus/raw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/raw.c b/drivers/staging/greybus/raw.c index 71de6776739c..4f217f20f1c0 100644 --- a/drivers/staging/greybus/raw.c +++ b/drivers/staging/greybus/raw.c @@ -20,7 +20,7 @@ struct gb_raw { struct list_head list; int list_data; - struct mutex list_lock; + struct mutex list_lock; /* protects gb_raw->list and gb_raw->list_data */ dev_t dev; struct cdev cdev; struct device *device; -- 2.43.0

3 days, 17 hours

[PATCH v3 0/4] staging: greybus: fixing checkpatch issues

by Rachit Dhar

This series fixes checkpatch.pl checks highlighted for files in greybus, for mutex declaration comments, and styling issues. Changes in v3: - Added cover letter detailing changes made in subsequent versions of patch-sets. - v2 patch-set was only emailed to maintainers. The email was forwarded to the lists, but this rendered the patch-set corrupted. v3 hopes to correct this. Changes in v2: - Split patch 1 into two individual patches 1/4 and 2/4 to keep logical changes separate. Rachit Dhar (4): staging: greybus: added comment to mutex declaration in fw-management.c staging: greybus: fixed styling issue in fw-management.c staging: greybus: resolved checkpatch checks for raw.c staging: greybus: resolved checkpatch checks for light.c drivers/staging/greybus/fw-management.c | 5 +++-- drivers/staging/greybus/light.c | 4 ++-- drivers/staging/greybus/raw.c | 2 +- 3 files changed, 6 insertions(+), 5 deletions(-) -- 2.43.0

3 days, 17 hours

[PATCH v2] staging: greybus: gbphy: replace sprintf() with sysfs_emit()

by Neel Bullywon

Replaced sprintf() with sysfs_emit() in the protocol_id_show() sysfs attribute function. This code is safe, as replacing sprintf() with sysfs_emit() gets rid of calls to sprintf() as part of kernel hardening and sysfs_emit() is more appropriate in this context. Signed-off-by: Neel Bullywon <neelb2403(a)gmail.com> --- This was compile-tested only (no VM/hardware used) --- drivers/staging/greybus/gbphy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c index 60cf09a302a7..55f132b09cee 100644 --- a/drivers/staging/greybus/gbphy.c +++ b/drivers/staging/greybus/gbphy.c @@ -31,7 +31,7 @@ static ssize_t protocol_id_show(struct device *dev, { struct gbphy_device *gbphy_dev = to_gbphy_dev(dev); - return sprintf(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); + return sysfs_emit(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); } static DEVICE_ATTR_RO(protocol_id); -- 2.44.0

3 days, 23 hours

[PATCH] staging: greybus: gbphy: replaced sprintf() with sysfs_emit()

by Neel Bullywon

Replaced sprintf() with sysfs_emit in the protocol_id_show() sysfs attribute func to prevent any potential buffer overflows This is to ensure a kernel-wide migration to safer string formatting functions for sysfs handlers This was compile-tested only (no VM/hardware used) Signed-off-by: Neel Bullywon <neelb2403(a)gmail.com> --- drivers/staging/greybus/gbphy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c index 60cf09a302a7..55f132b09cee 100644 --- a/drivers/staging/greybus/gbphy.c +++ b/drivers/staging/greybus/gbphy.c @@ -31,7 +31,7 @@ static ssize_t protocol_id_show(struct device *dev, { struct gbphy_device *gbphy_dev = to_gbphy_dev(dev); - return sprintf(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); + return sysfs_emit(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id); } static DEVICE_ATTR_RO(protocol_id); -- 2.44.0

4 days, 2 hours

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greybus-dev February 2026