linux/sound/usb, branch master

ALSA: usb-audio: Fix missing error handling for get_min_max*()

2026-04-14T10:30:51Z

The recent fix to add the error return value check from get_min_max*() missed one case in build_audio_procunit() where no error value is set. This may lead to an uninitialized variable and confuse the caller (although this wouldn't happen practically because err is set for the loop of num_ins at the beginning of the funciton). Fix it by setting "err = 0" properly at the missing case, too. Fixes: 4f55a85cd4fc ("ALSA: usb-audio: Add error checks against get_min_max*()") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/ad36dGpCBTGsyFr_@stanley.mountain Link: https://patch.msgid.link/20260414093336.305464-1-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: usb-audio: Exclude Scarlett 18i20 1st Gen from SKIP_IFACE_SETUP

2026-04-13T18:17:14Z

Same issue as the other 1st Gen Scarletts: QUIRK_FLAG_SKIP_IFACE_SETUP causes distorted audio on the Scarlett 18i20 1st Gen (1235:800c). Fixes: 38c322068a26 ("ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP") Reported-by: tucktuckg00se [https://github.com/geoffreybennett/linux-fcp/issues/54] Signed-off-by: Geoffrey D. Bennett Link: https://patch.msgid.link/ad0ozNnkcFrcjVQz@m.b4.vu Signed-off-by: Takashi Iwai

Merge tag 'asoc-v7.1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

2026-04-13T16:09:48Z

ASoC: Updates for v7.1 There's one new core feature here but mostly this has been a fairly quiet release, we've got a few new drivers and one core feature that's likely to be relatively rarely used but the bulk of the work this time around has been on quality. - Support for bus keepers, this will be used by the Apple device support. - Enhancements to the SDCA support, incuding retaskable jacks. - Unwinding of the pcm_new()/pcm_free() cleanups from Morimoto-san. - Test improvements for the Cirrus Logic drivers. - Large sets of fixes for the NXP, nVidia and Qualcomm drivers. - Support for AMD RPL DMICs, Cirrus Logic CS42L43 and CS47L47, nVidia machines with CPCAP and WM8962.

ALSA: caiaq: take a reference on the USB device in create_card()

2026-04-13T05:33:15Z

The caiaq driver stores a pointer to the parent USB device in cdev->chip.dev but never takes a reference on it. The card's private_free callback, snd_usb_caiaq_card_free(), can run asynchronously via snd_card_free_when_closed() after the USB device has already been disconnected and freed, so any access to cdev->chip.dev in that path dereferences a freed usb_device. On top of the refcounting issue, the current card_free implementation calls usb_reset_device(cdev->chip.dev). A reset in a free callback is inappropriate: the device is going away, the call takes the device lock in a teardown context, and the reset races with the disconnect path that the callback is already cleaning up after. Take a reference on the USB device in create_card() with usb_get_dev(), drop it with usb_put_dev() in the free callback, and remove the usb_reset_device() call. Fixes: b04dcbb7f7b1 ("ALSA: caiaq: Use snd_card_free_when_closed() at disconnection") Cc: stable@vger.kernel.org Cc: Andrey Konovalov Signed-off-by: Berk Cem Goksel Link: https://patch.msgid.link/20260413034941.1131465-3-berkcgoksel@gmail.com Signed-off-by: Takashi Iwai

Merge branch 'for-next' into for-linus

2026-04-13T05:18:36Z

Signed-off-by: Takashi Iwai

ALSA: usb-audio: Do not expose sticky mixers

2026-04-11T08:03:14Z

Some devices' mixers are sticky, which accept SET_CUR but do absolutely nothing. Registering these mixers confuses userspace and results in ineffective volume control. Check if a mixer is sticky by setting the volume to the maximum or minimum value and checking for effectiveness afterward. Prevent the mixer from being registered if it turns out to be sticky. Quirky device sample: usb 7-1: New USB device found, idVendor=0e0b, idProduct=fa01, bcdDevice= 1.00 usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 7-1: Product: Feaulle Rainbow usb 7-1: Manufacturer: Generic usb 7-1: SerialNumber: 20210726905926 (Mic Capture Volume) Signed-off-by: Rong Zhang Link: https://patch.msgid.link/20260411-uac-sticky-mixer-v1-3-29d62717befd@rong.moe Signed-off-by: Takashi Iwai

ALSA: usb-audio: Move volume control resolution check into a function

2026-04-11T08:02:53Z

get_min_max_with_quirks() is too lengthy and hard to read. Move the volume control resolution check code into a function as it's relatively self-contained. Suggested-by: Takashi Iwai Link: https://lore.kernel.org/r/87o6jsk3vs.wl-tiwai@suse.de Signed-off-by: Rong Zhang Link: https://patch.msgid.link/20260411-uac-sticky-mixer-v1-2-29d62717befd@rong.moe Signed-off-by: Takashi Iwai

ALSA: usb-audio: Add error checks against get_min_max*()

2026-04-11T08:02:25Z

All callers of get_min_max*() ignore the latter's return code completely. This means to ignore temporary errors at the probe time. However, it is not optimal and leads to some maintenance burdens. Return -EAGAIN for temporary errors, and check against it in the callers of get_min_max*(). If any other error occurs, bail out of the caller early. Suggested-by: Takashi Iwai Link: https://lore.kernel.org/r/87ldewi4j8.wl-tiwai@suse.de Signed-off-by: Rong Zhang Link: https://patch.msgid.link/20260411-uac-sticky-mixer-v1-1-29d62717befd@rong.moe Signed-off-by: Takashi Iwai

ALSA: usb-audio: Add quirk for PreSonus AudioBox USB

2026-04-10T15:05:47Z

The PreSonus AudioBox USB (0x194f:0x0301) only supports S24_3LE format for both playback and capture. It does not support S16_LE despite being a USB full-speed device. Add explicit format quirks for both the playback (interface 2) and capture (interface 3) interfaces to ensure correct format negotiation. Signed-off-by: Abhinav Mahadevan Link: https://patch.msgid.link/20260410143335.5974-1-abhi220204@gmail.com Signed-off-by: Takashi Iwai

ALSA: usb-audio: Evaluate packsize caps at the right place

2026-04-10T14:34:06Z

We introduced the upper bound checks of the packet sizes by the ep->maxframesize for avoiding the URB submission errors. However, the check was applied at an incorrect place in the function snd_usb_endpoint_set_params() where ep->maxframesize isn't defined yet; the value is defined at a bit later position. So this ended up with a failure at the first run while the second run works. For fixing it, move the check at the correct place, right after the calculation of ep->maxframesize in the same function. Fixes: 7fe8dec3f628 ("ALSA: usb-audio: Cap the packet size pre-calculations") Link: https://bugzilla.kernel.org/show_bug.cgi?id=221292 Cc: Link: https://patch.msgid.link/20260410143220.1676344-1-tiwai@suse.de Signed-off-by: Takashi Iwai