kernel/linux.git/sound/ac97, branch v6.19.12

ALSA: ac97: fix a double free in snd_ac97_controller_register()

2025-12-23T09:43:43+00:00

If ac97_add_adapter() fails, put_device() is the correct way to drop the device reference. kfree() is not required. Add kfree() if idr_alloc() fails and in ac97_adapter_release() to do the cleanup. Found by code review. Fixes: 74426fbff66e ("ALSA: ac97: add an ac97 bus") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li Link: https://patch.msgid.link/20251219162845.657525-1-lihaoxiang@isrc.iscas.ac.cn Signed-off-by: Takashi Iwai

ALSA: ac97bus: Use guard() for mutex locks

2025-09-01T11:54:28+00:00

Replace the manual mutex 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/20250829151335.7342-18-tiwai@suse.de

ALSA: ac97: Convert to RUNTIME_PM_OPS() macro

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

Use a newer RUNTIME_PM_OPS() macro instead of SET_RUNTIME_PM_OPS() together with pm_ptr(), which makes CONFIG_PM ifdefs superfluous. This optimizes slightly when CONFIG_PM is disabled, too. Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20250313170731.26943-2-tiwai@suse.de

ALSA: ac97: bus: Fix the mistake in the comment

2024-11-20T11:42:01+00:00

Fix mistake in the comment. sound/ac97/bus.c:192: warning: Function parameter or member 'drv' not described in 'snd_ac97_codec_driver_register' sound/ac97/bus.c:192: warning: Excess function parameter 'dev' description in 'snd_ac97_codec_driver_register' sound/ac97/bus.c:205: warning: Function parameter or member 'drv' not described in 'snd_ac97_codec_driver_unregister' sound/ac97/bus.c:205: warning: Excess function parameter 'dev' description in 'snd_ac97_codec_driver_unregister' sound/ac97/bus.c:351: warning: Function parameter or member 'codecs_pdata' not described in 'snd_ac97_controller_register' Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202411180804.FUfdymYO-lkp@intel.com/ Fixes: 74426fbff66e ("ALSA: ac97: add an ac97 bus") Signed-off-by: Pei Xiao Link: https://patch.msgid.link/3990bfc8cd47637908eaa179802c1d91459d829b.1732083924.git.xiaopei01@kylinos.cn Signed-off-by: Takashi Iwai

driver core: have match() callback in struct bus_type take a const *

2024-07-03T13:16:54+00:00

In the match() callback, the struct device_driver * should not be changed, so change the function callback to be a const *. This is one step of many towards making the driver core safe to have struct device_driver in read-only memory. Because the match() callback is in all busses, all busses are modified to handle this properly. This does entail switching some container_of() calls to container_of_const() to properly handle the constant *. For some busses, like PCI and USB and HV, the const * is cast away in the match callback as those busses do want to modify those structures at this point in time (they have a local lock in the driver structure.) That will have to be changed in the future if they wish to have their struct device * in read-only-memory. Cc: Rafael J. Wysocki Reviewed-by: Alex Elder Acked-by: Sumit Garg Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh Signed-off-by: Greg Kroah-Hartman

ALSA: ac97: bus: Add missing module description

2024-05-09T08:13:07+00:00

Now that make W=1 starts complaining the lack of MODULE_DESCRIPTION(), let's add the missing information. Reported-by: Andy Shevchenko Closes: https://lore.kernel.org/r/ZjpQm-hxLQtpgkUx@smile.fi.intel.com Signed-off-by: Takashi Iwai Reviewed-by: Andy Shevchenko Reviewed-by: Dragan Simic Link: https://lore.kernel.org/r/20240508091128.25274-3-tiwai@suse.de

ALSA: ac97: fix build regression

2024-01-03T10:47:04+00:00

The ac97_bus_type structure is no longer declared in this file: sound/ac97/bus.c: In function 'ac97_codec_add': sound/ac97/bus.c:112:27: error: 'ac97_bus_type' undeclared (first use in this function); did you mean 'bus_type'? 112 | codec->dev.bus = &ac97_bus_type; | ^~~~~~~~~~~~~ | bus_type sound/ac97/bus.c:112:27: note: each undeclared identifier is reported only once for each function it appears in sound/ac97/bus.c: In function 'snd_ac97_codec_driver_register': sound/ac97/bus.c:191:28: error: 'ac97_bus_type' undeclared (first use in this function); did you mean 'ac97_bus_reset'? 191 | drv->driver.bus = &ac97_bus_type; Include the header that contains the declaration and make sure the definition is const but not static. Fixes: 66e82d219924 ("ALSA: mark all struct bus_type as const") Reviewed-by: Greg Kroah-Hartman Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20240103102544.3715055-1-arnd@kernel.org Signed-off-by: Takashi Iwai

ALSA: mark all struct bus_type as const

2023-12-30T09:10:41+00:00

Now that the driver core can properly handle constant struct bus_type, move all of the sound subsystem struct bus_type structures as const, placing them into read-only memory which can not be modified at runtime. Note, this fixes a duplicate definition of ac97_bus_type, which somehow was declared extern in a .h file, and then static as a prototype in a .c file, and then properly later on in the same .c file. Amazing that no compiler warning ever showed up for this. Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Dawei Li Cc: Yu Liao Cc: "Rafael J. Wysocki" Cc: Hans de Goede Cc: linux-sound@vger.kernel.org Signed-off-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/2023121945-immersion-budget-d0aa@gregkh Signed-off-by: Takashi Iwai

ALSA: ac97: set variables dev_attr_vendor_id to static

2023-08-02T07:27:39+00:00

sparse reports sound/ac97/bus.c:465:1: sparse: sparse: symbol 'dev_attr_vendor_id' was not declared. Should it be static? This variable is only used in its defining file, so it should be static. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202307242300.Oy0Dp2QI-lkp@intel.com/ Signed-off-by: Yu Liao Link: https://lore.kernel.org/r/20230802022649.2514787-1-liaoyu15@huawei.com Signed-off-by: Takashi Iwai

ALSA: ac97: make remove callback of ac97 driver void returned

2023-01-25T08:34:20+00:00

Since commit fc7a6209d571 ("bus: Make remove callback return void") forces bus_type::remove be void-returned, it doesn't make much sense for any bus based driver implementing remove callbalk to return non-void to its caller. As such, change the remove function for ac97 based drivers to return void. Signed-off-by: Dawei Li Link: https://lore.kernel.org/r/TYCP286MB2323A5AB1B2578EF4FA15DA7CAFB9@TYCP286MB2323.JPNP286.PROD.OUTLOOK.COM Signed-off-by: Takashi Iwai