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linux/sound/usb/6fire
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Cássio Gabriel dc88eef8f5 ALSA: 6fire: Fix input volume change detection 
usb6fire_control_input_vol_put() stores the analog capture volume
as a signed offset in rt->input_vol[] (-15..+15), but it compares
the cached value against the user-visible mixer value (0..30)
before subtracting 15.

This mixes two domains in the change detection path. Since the
runtime is zero-initialized, the visible default is 15; writing 0
right after probe is ignored, while writing 15 is reported as a
change even though the cached value remains 0.

Normalize the user value before comparing it with the cached offset.

Fixes: 06bb4e7435 ("ALSA: snd-usb-6fire: add analog input volume control")
Cc: stable@vger.kernel.org
Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com>
Link: https://patch.msgid.link/20260416-alsa-6fire-input-volume-change-detection-v1-1-ec78299168df@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2026-04-17 09:51:26 +02:00
..
chip.c ALSA: 6fire: Drop unnecessary NULL checks 2026-04-15 14:27:28 +02:00
chip.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
comm.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
comm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
control.c ALSA: 6fire: Fix input volume change detection 2026-04-17 09:51:26 +02:00
control.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
firmware.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
firmware.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Makefile ALSA: usb: Use *-y instead of *-objs in Makefile 2024-05-08 18:17:53 +02:00
midi.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
midi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
pcm.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pcm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00