Some users reported the kernel WARNING with stack traces from
hdmi_pcm_close(), and it's the line checking the per_cvt->assigned
flag. This used to be a valid check in the past because the flag was
turned on/off only at opening and closing a PCM stream. Meanwhile,
since the introduction of the silent-stream mode, this flag may be
turned on/off at the monitor connection/disconnection time, which
isn't always associated with the PCM open/close. Hence this may lead
to the inconsistent per_cvt->assigned flag at closing.
As the check itself became almost useless and confuses users as if it
were a serious problem, just drop the check.
Fixes: b1a5039759cb ("ALSA: hda/hdmi: fix silent stream for first playback to DP")
Cc: <stable@xxxxxxxxxxxxxxx>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=210987
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/pci/hda/patch_hdmi.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 97adff0cbcab..e405be7929e3 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2130,7 +2130,6 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
goto unlock;
}
per_cvt = get_cvt(spec, cvt_idx);
- snd_BUG_ON(!per_cvt->assigned);
per_cvt->assigned = 0;
hinfo->nid = 0;
--
2.26.2
