ALSA: usb-audio: Add PM guard to Scarlett meter reads

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The Scarlett Gen 1 meter callback reads the device without preventing
runtime suspend or disconnect. The transfer can fail when userspace
polls the volatile control after the device suspends.

Hold snd_usb_lock across the meter request. This matches the guarded
Forte and common mixer control paths in this file.

Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Will Porter <mrwillporter@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260827232143.149197-4-mrwillporter@gmail.com

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Will Porter 2026-08-27 18:21:40 -05:00 • committed by Takashi Iwai

parent 9e6c9d7531

commit 103da4a7bc

1 changed files with 4 additions and 0 deletions

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sound/usb/mixer_scarlett.c

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