ALSA: hda/realtek: add missing error checks for COEF index reads in alc269

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alc_read_coef_idx() and alc_read_coefex_idx() can return -1 on error
via snd_hda_codec_read(). Several codec initialization and shutdown
functions save these return values and later write them back to
hardware registers without checking for errors, potentially corrupting
COEF register state on a read failure.

Add error checks in:
- alc282_init() and alc282_shutup(): check coef78 before write-back
- alc285_hp_init(): check coef38/coef0d/coef36 before update, check
  val before write-back, and break polling loop on error
- alc294_hp_init(): break polling loop on read error

Signed-off-by: Bob Song <songxiebing@kylinos.cn>
Link: https://patch.msgid.link/20260730015302.253008-1-songxiebing@kylinos.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

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Bob Song 2026-07-30 09:53:01 +08:00 • committed by Takashi Iwai

parent 494978ae82

commit 5b106b40ed

1 changed files with 14 additions and 8 deletions

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sound/hda/codecs/realtek/alc269.c

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