kernel/linux.git/drivers/staging/most, branch v5.15.219

staging: most: video: avoid double free on video register failure

2026-07-24T13:51:37+00:00

[ Upstream commit 7cb1c5b32a2bfde961fff8d5204526b609bcb30a ] comp_register_videodev() allocates a video_device with video_device_alloc() and releases it if video_register_device() fails. This can double free the video_device when __video_register_device() reaches device_register() and that call fails: video_register_device() -> __video_register_device() -> device_register() fails -> put_device(&vdev->dev) -> v4l2_device_release() -> vdev->release(vdev) -> video_device_release(vdev) comp_register_videodev() -> video_device_release(mdev->vdev) Use video_device_release_empty() while registering the device so that registration failure paths do not free mdev->vdev through vdev->release(). comp_register_videodev() then releases mdev->vdev exactly once on failure. Restore video_device_release() after successful registration so the registered device keeps its normal lifetime handling. This issue was found by a static analysis tool I am developing. Fixes: eab231c0398a ("staging: most: v4l2-aim: remove unnecessary label err_vbi_dev") Signed-off-by: Guangshuo Li Link: https://patch.msgid.link/20260517111218.945796-1-lgs201920130244@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

staging: most: dim2: use device release method

2021-12-17T09:30:16+00:00

commit d445aa402d60014a37a199fae2bba379696b007d upstream. Commit 723de0f9171e ("staging: most: remove device from interface structure") moved registration of driver-provided struct device to the most subsystem. This updated dim2 driver as well. However, struct device passed to register_device() becomes refcounted, and must not be explicitly deallocated, but must provide release method instead. Which is incompatible with managing it via devres. This patch makes the device structure allocated without devres, adds device release method, and moves device destruction there. Fixes: 723de0f9171e ("staging: most: remove device from interface structure") Signed-off-by: Nikita Yushchenko Link: https://lore.kernel.org/r/20211005143448.8660-2-nikita.yoush@cogentembedded.com Signed-off-by: Greg Kroah-Hartman

staging: most: dim2: do not double-register the same device

2021-11-18T18:16:52+00:00

[ Upstream commit 2ab189164056b05474275bb40caa038a37713061 ] Commit 723de0f9171e ("staging: most: remove device from interface structure") moved registration of driver-provided struct device to the most subsystem. Dim2 used to register the same struct device to provide a custom device attribute. This causes double-registration of the same struct device. Fix that by moving the custom attribute to driver's dev_groups. This moves attribute to the platform_device object, which is a better location for platform-specific attributes anyway. Fixes: 723de0f9171e ("staging: most: remove device from interface structure") Acked-by: Christian Gromm Signed-off-by: Nikita Yushchenko Link: https://lore.kernel.org/r/20211011061117.21435-1-nikita.yoush@cogentembedded.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

staging/most: Remove all strcpy() uses in favor of strscpy()

2021-07-27T13:10:41+00:00

strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy(). Signed-off-by: Len Baker Link: https://lore.kernel.org/r/20210717160512.16176-1-len.baker@gmx.com Signed-off-by: Greg Kroah-Hartman

staging: most: dim2: hal: Demote non-conformant kernel-doc headers

2021-05-10T09:19:26+00:00

Fixes the following W=1 kernel build warning(s): drivers/staging/most/dim2/hal.c:99: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst drivers/staging/most/dim2/hal.c:788: warning: Function parameter or member 'buf_size' not described in 'dim_norm_isoc_buffer_size' drivers/staging/most/dim2/hal.c:788: warning: Function parameter or member 'packet_length' not described in 'dim_norm_isoc_buffer_size' drivers/staging/most/dim2/hal.c:788: warning: expecting prototype for Retrieves maximal possible correct buffer size for isochronous data type(). Prototype was for dim_norm_isoc_buffer_size() instead drivers/staging/most/dim2/hal.c:802: warning: Function parameter or member 'buf_size' not described in 'dim_norm_sync_buffer_size' drivers/staging/most/dim2/hal.c:802: warning: Function parameter or member 'bytes_per_frame' not described in 'dim_norm_sync_buffer_size' drivers/staging/most/dim2/hal.c:802: warning: expecting prototype for Retrieves maximal possible correct buffer size for synchronous data type(). Prototype was for dim_norm_sync_buffer_size() instead Cc: Greg Kroah-Hartman Cc: Lee Jones Cc: Andrey Shvetsov Cc: linux-staging@lists.linux.dev Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20210414181129.1628598-36-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman

staging: most: dim2: hal: Fix one kernel-doc header and demote two non-conforming ones

2021-05-10T09:19:25+00:00

Fixes the following W=1 kernel build warning(s): drivers/staging/most/dim2/hal.c:99: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst drivers/staging/most/dim2/hal.c:788: warning: Function parameter or member 'buf_size' not described in 'dim_norm_isoc_buffer_size' drivers/staging/most/dim2/hal.c:788: warning: Function parameter or member 'packet_length' not described in 'dim_norm_isoc_buffer_size' drivers/staging/most/dim2/hal.c:788: warning: expecting prototype for Retrieves maximal possible correct buffer size for isochronous data type(). Prototype was for dim_norm_isoc_buffer_size() instead drivers/staging/most/dim2/hal.c:802: warning: Function parameter or member 'buf_size' not described in 'dim_norm_sync_buffer_size' drivers/staging/most/dim2/hal.c:802: warning: Function parameter or member 'bytes_per_frame' not described in 'dim_norm_sync_buffer_size' drivers/staging/most/dim2/hal.c:802: warning: expecting prototype for Retrieves maximal possible correct buffer size for synchronous data type(). Prototype was for dim_norm_sync_buffer_size() instead Cc: Greg Kroah-Hartman Cc: Andrey Shvetsov Cc: linux-staging@lists.linux.dev Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20210414181129.1628598-35-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman

staging: most: i2c: Fix a little doc-rot

2021-05-10T09:19:25+00:00

Fixes the following W=1 kernel build warning(s): drivers/staging/most/i2c/i2c.c:66: warning: Function parameter or member 'most_iface' not described in 'configure_channel' drivers/staging/most/i2c/i2c.c:66: warning: Function parameter or member 'ch_idx' not described in 'configure_channel' drivers/staging/most/i2c/i2c.c:66: warning: Excess function parameter 'iface' description in 'configure_channel' drivers/staging/most/i2c/i2c.c:66: warning: Excess function parameter 'channel' description in 'configure_channel' drivers/staging/most/i2c/i2c.c:121: warning: Function parameter or member 'most_iface' not described in 'enqueue' drivers/staging/most/i2c/i2c.c:121: warning: Function parameter or member 'ch_idx' not described in 'enqueue' drivers/staging/most/i2c/i2c.c:121: warning: Excess function parameter 'iface' description in 'enqueue' drivers/staging/most/i2c/i2c.c:121: warning: Excess function parameter 'channel' description in 'enqueue' drivers/staging/most/i2c/i2c.c:166: warning: Function parameter or member 'most_iface' not described in 'poison_channel' drivers/staging/most/i2c/i2c.c:166: warning: Function parameter or member 'ch_idx' not described in 'poison_channel' drivers/staging/most/i2c/i2c.c:166: warning: Excess function parameter 'iface' description in 'poison_channel' drivers/staging/most/i2c/i2c.c:166: warning: Excess function parameter 'channel_id' description in 'poison_channel' Cc: Greg Kroah-Hartman Cc: Andrey Shvetsov Cc: linux-staging@lists.linux.dev Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20210414181129.1628598-34-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman

staging: most: dim2: Provide missing descriptions and fix doc-rot

2021-05-10T09:19:25+00:00

Also demote merely half-complete header. Fixes the following W=1 kernel build warning(s): drivers/staging/most/dim2/dim2.c:69: warning: Function parameter or member 'name' not described in 'hdm_channel' drivers/staging/most/dim2/dim2.c:69: warning: Function parameter or member 'reset_dbr_size' not described in 'hdm_channel' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'dev' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'name' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'clk_speed' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'clk' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'clk_pll' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'bus' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'on_netinfo' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:104: warning: Function parameter or member 'disable_platform' not described in 'dim2_hdm' drivers/staging/most/dim2/dim2.c:440: warning: Function parameter or member 'most_iface' not described in 'configure_channel' drivers/staging/most/dim2/dim2.c:440: warning: Function parameter or member 'ch_idx' not described in 'configure_channel' drivers/staging/most/dim2/dim2.c:440: warning: Function parameter or member 'ccfg' not described in 'configure_channel' drivers/staging/most/dim2/dim2.c:440: warning: Excess function parameter 'iface' description in 'configure_channel' drivers/staging/most/dim2/dim2.c:440: warning: Excess function parameter 'channel' description in 'configure_channel' drivers/staging/most/dim2/dim2.c:440: warning: Excess function parameter 'channel_config' description in 'configure_channel' drivers/staging/most/dim2/dim2.c:558: warning: Function parameter or member 'most_iface' not described in 'enqueue' drivers/staging/most/dim2/dim2.c:558: warning: Function parameter or member 'ch_idx' not described in 'enqueue' drivers/staging/most/dim2/dim2.c:558: warning: Excess function parameter 'iface' description in 'enqueue' drivers/staging/most/dim2/dim2.c:558: warning: Excess function parameter 'channel' description in 'enqueue' drivers/staging/most/dim2/dim2.c:591: warning: Function parameter or member 'most_iface' not described in 'request_netinfo' drivers/staging/most/dim2/dim2.c:591: warning: Function parameter or member 'ch_idx' not described in 'request_netinfo' drivers/staging/most/dim2/dim2.c:591: warning: Function parameter or member 'on_netinfo' not described in 'request_netinfo' drivers/staging/most/dim2/dim2.c:591: warning: Excess function parameter 'iface' description in 'request_netinfo' drivers/staging/most/dim2/dim2.c:591: warning: Excess function parameter 'channel_id' description in 'request_netinfo' drivers/staging/most/dim2/dim2.c:631: warning: Function parameter or member 'most_iface' not described in 'poison_channel' drivers/staging/most/dim2/dim2.c:631: warning: Function parameter or member 'ch_idx' not described in 'poison_channel' drivers/staging/most/dim2/dim2.c:631: warning: Excess function parameter 'iface' description in 'poison_channel' drivers/staging/most/dim2/dim2.c:631: warning: Excess function parameter 'channel_id' description in 'poison_channel' Cc: Greg Kroah-Hartman Cc: "Nícolas F. R. A. Prado" Cc: Andrey Shvetsov Cc: linux-staging@lists.linux.dev Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20210414181129.1628598-30-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman

staging: most: net: Fix some kernel-doc formatting issues

2021-05-10T09:19:25+00:00

Fixes the following W=1 kernel build warning(s): drivers/staging/most/net/net.c:548: warning: Function parameter or member 'iface' not described in 'on_netinfo' drivers/staging/most/net/net.c:548: warning: Function parameter or member 'link_stat' not described in 'on_netinfo' drivers/staging/most/net/net.c:548: warning: Function parameter or member 'mac_addr' not described in 'on_netinfo' Cc: Greg Kroah-Hartman Cc: Andrey Shvetsov Cc: linux-staging@lists.linux.dev Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20210414181129.1628598-27-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman

drivers: most: add ALSA sound driver

2021-03-23T09:03:13+00:00

This patch moves the ALSA sound driver out of the staging area and adds it to the stable part of the MOST driver. Modifications to the Makefiles and Kconfigs are done accordingly to not break the build. Signed-off-by: Christian Gromm Link: https://lore.kernel.org/r/1612865627-29950-1-git-send-email-christian.gromm@microchip.com Signed-off-by: Greg Kroah-Hartman