kernel/linux.git/sound/hda/common/codec.c, branch v7.0.10

ALSA: hda: Notify IEC958 Default PCM switch state changes

2026-05-23T11:08:52+00:00

[ Upstream commit 6692ed9b4ced29aa819c95cc4ad9e2dc8720c081 ] The "IEC958 Default PCM Playback Switch" control is backed directly by mout->share_spdif. The share-switch callbacks currently access that state without serialization, and spdif_share_sw_put() always returns 0, so normal userspace writes never emit the standard ALSA control value notification. snd_hda_multi_out_analog_open() may also clear mout->share_spdif when the analog PCM capabilities and the SPDIF capabilities no longer intersect. That fallback is still needed to avoid creating an impossible hw constraint set, but it changes the mixer backing value without notifying subscribers. Protect the share-switch callbacks with spdif_mutex like the other SPDIF control handlers, return the actual change value from spdif_share_sw_put(), and notify the cached control when the open path forcibly disables shared SPDIF mode after dropping spdif_mutex. This keeps the existing auto-disable behavior while making switch state changes visible to userspace. Fixes: 9a08160bdbe3 ("[ALSA] hda-codec - Add "IEC958 Default PCM" switch") Fixes: 022b466fc353 ("ALSA: hda - Avoid invalid formats and rates with shared SPDIF") Suggested-by: Takashi Iwai Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260403-hda-spdif-share-notify-v3-1-4eb1356b0f17@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

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

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

This is the exact same thing as the 'alloc_obj()' version, only much smaller because there are a lot fewer users of the *alloc_flex() interface. As with alloc_obj() version, this was done entirely with mindless brute force, using the same script, except using 'flex' in the pattern rather than 'objs*'. Signed-off-by: Linus Torvalds

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: hda: Relax __free() variable declarations

2025-12-17T09:08:30+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: ee0b0f5d32fe ("ALSA: hda/generic: Use auto cleanup for temporary buffers") Fixes: 03c5c350e38d ("ALSA: hda/realtek: Add support for new HP G12 laptops") Fixes: b0550d4c2dd8 ("ALSA: hda/common: Use auto cleanup for temporary buffers") Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20251216140634.171890-10-tiwai@suse.de

ALSA: hda/common: Use guard() for spinlocks

2025-08-29T09:52:15+00:00

Replace the manual spin lock/unlock pairs with guard() for code simplification. Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250827072916.31933-25-tiwai@suse.de

ALSA: hda/common: Use auto cleanup for temporary buffers

2025-08-29T09:52:15+00:00

The release of temporary kmalloced buffers can be nicely handled via the standard __free(kfree). Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250827072916.31933-20-tiwai@suse.de

ALSA: hda/common: Use guard() for mutex locks

2025-08-29T09:52:14+00:00

Replace the manual mutex lock/unlock pairs with guard(). Only code refactoring, and no behavior change. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250827072916.31933-8-tiwai@suse.de

ALSA: hda/common: Use cleanup macros for PM controls

2025-08-29T09:52:14+00:00

The new macro CLASS(snd_hda_power_pm) can replace the manual snd_hda_power_up_pm() and _down() calls gracefully. A part of the code in codec_exec_verb() is factored out to a function, so that the auto-cleanup can be well scoped. Merely cleanups and no functional changes. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250827072916.31933-6-tiwai@suse.de

ALSA: hda: Use min() to simplify snd_hda_get_devices()

2025-08-14T06:39:54+00:00

Use min() to simplify snd_hda_get_devices() and improve its readability. Change the function parameter 'max_devices' from 'int' to 'unsigned int' to avoid a min() signedness error. Update all related local variables and the function's return type to 'unsigned int' accordingly. No functional changes intended. Signed-off-by: Thorsten Blum Link: https://patch.msgid.link/20250813205507.215658-2-thorsten.blum@linux.dev Signed-off-by: Takashi Iwai