kernel/linux.git/sound/core/pcm.c, branch linux-7.1.y

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

ALSA: pcm: Relax __free() variable declarations

2025-12-17T09:08:29+00:00

We used to have a variable declaration with __free() initialized with NULL. This was to keep the old coding style rule, but recently it's relaxed and rather recommends to follow the new rule to declare in place of use for __free() -- which avoids potential deadlocks or UAFs with nested cleanups. Although the current code has no bug, per se, let's follow the new standard and move the declaration to the place of assignment (or directly assign the allocated result) instead of NULL initializations. Fixes: ae9213984864 ("ALSA: pcm: Use automatic cleanup of kfree()") Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20251216140634.171890-4-tiwai@suse.de

ALSA: pcm: Convert to SYSTEM_SLEEP_PM_OPS()

2025-03-14T10:07:13+00:00

Use the newer SYSTEM_SLEEP_PM_OPS() macro instead of SET_SYSTEM_SLEEP_PM_OPS(), which makes CONFIG_PM_SLEEP ifdefs superfluous. Merely a cleanup, there should be no actual code change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250313170731.26943-4-tiwai@suse.de

ALSA: pcm: Add xrun counter for snd_pcm_substream

2024-08-10T08:40:58+00:00

This patch adds an xrun counter to snd_pcm_substream as an alternative to using logs from XRUN_DEBUG_BASIC. The counter provides a way to track the number of xrun occurences, accessible through the /proc interface. The counter is enabled when CONFIG_SND_PCM_XRUN_DEBUG is set. Example output: $ cat /proc/asound/card0/pcm9p/sub0/status owner_pid : 1425 trigger_time: 235.248957291 tstamp : 0.000000000 delay : 1912 avail : 480 avail_max : 1920 ----- hw_ptr : 672000 appl_ptr : 673440 xrun_counter: 3 # (new row) Signed-off-by: Norman Bintang Reviewed-by: Chih-Yang Hsia Tested-by: Chih-Yang Hsia Reviewed-by: David Riley Link: https://patch.msgid.link/20240809140648.3414349-1-normanbt@chromium.org Signed-off-by: Takashi Iwai

ALSA: pcm: Use guard() for locking

2024-02-28T14:01:22+00:00

We can simplify the code gracefully with new guard() macro and co for automatic cleanup of locks. Only the code refactoring, and no functional changes. Signed-off-by: Takashi Iwai Link: https://lore.kernel.org/r/20240227085306.9764-22-tiwai@suse.de

ALSA: pcm: Use automatic cleanup of kfree()

2024-02-23T09:57:30+00:00

There are common patterns where a temporary buffer is allocated and freed at the exit, and those can be simplified with the recent cleanup mechanism via __free(kfree). A caveat is that some allocations are memdup_user() and they return an error pointer instead of NULL. Those need special cares and the value has to be cleared with no_free_ptr() at the allocation error path. Other than that, the conversions are straightforward. No functional changes, only code refactoring. Signed-off-by: Takashi Iwai Link: https://lore.kernel.org/r/20240222111509.28390-2-tiwai@suse.de

ALSA: pcm: Fix snd_pcm_format_name function

2024-01-30T13:11:29+00:00

Fix snd_pcm_format_name so it won't return NULL-pointer in case if it can't find the format in the 'snd_pcm_format_names' list. Return "Unknown" instead, as it is done if the number passed to the function is larger than a list size. Signed-off-by: Ivan Orlov Link: https://lore.kernel.org/r/20240125223522.1122765-2-ivan.orlov0322@gmail.com Signed-off-by: Takashi Iwai

ALSA: pcm: Add missing formats to formats list

2024-01-30T13:11:02+00:00

Add 4 missing formats to 'snd_pcm_format_names' array in order to be able to get their names with 'snd_pcm_format_name' function. Signed-off-by: Ivan Orlov Link: https://lore.kernel.org/r/20240125223522.1122765-1-ivan.orlov0322@gmail.com Signed-off-by: Takashi Iwai

Merge branch 'topic/cs35l41' into for-next

2023-12-29T14:14:07+00:00

Pull CS35L41 codec extension series. Signed-off-by: Takashi Iwai