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ALSA: pcm: Harden the spk_alloc assumption check

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If the parsed ELD has spk_alloc=0, it currently assigns the parsed ELD
spk_alloc to 0xffff. However, we should also check if there is at least
one SAD (Short audio descriptor) to enforce the assumption, as ELD
without any sad_count, is usually considered invalid for e.g. in
commit ce9778b7a0272("ALSA: hda/hdmi: Consider ELD is invalid when no
SAD is present").

Signed-off-by: Umang Jain <uajain@igalia.com>
Link: https://patch.msgid.link/20251120141757.901505-1-uajain@igalia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Umang Jain
2025-11-20 19:47:57 +05:30
committed by Takashi Iwai
parent c639065e14
commit 9ef1203fc7
1 changed files with 1 additions and 1 deletions
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2
sound/core/pcm_drm_eld.c
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@@ -379,7 +379,7 @@ int snd_parse_eld(struct device *dev, struct snd_parsed_hdmi_eld *e,
* in console or for audio devices. Assume the highest speakers * in console or for audio devices. Assume the highest speakers
* configuration, to _not_ prohibit multi-channel audio playback. * configuration, to _not_ prohibit multi-channel audio playback.
*/ */
if (!e->spk_alloc) if (!e->spk_alloc && e->sad_count)
e->spk_alloc = 0xffff; e->spk_alloc = 0xffff;
return 0; return 0;