linux-kernel - [PATCH AUTOSEL 5.10 08/14] ALSA: hda/hdmi: Fix the converter reuse for the silent stream

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Date:   Sun,  2 Oct 2022 18:51:49 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jaroslav Kysela <perex@...ex.cz>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.de>, Sasha Levin <sashal@...nel.org>,
        tiwai@...e.com, mkumard@...dia.com,
        pierre-louis.bossart@...ux.intel.com,
        ville.syrjala@...ux.intel.com, kai.heng.feng@...onical.com,
        alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 5.10 08/14] ALSA: hda/hdmi: Fix the converter reuse for the silent stream

From: Jaroslav Kysela <perex@...ex.cz>

[ Upstream commit 5f80d6bd2b01de4cafac3302f58456bf860322fc ]

When the user space pcm stream uses the silent stream converter,
it is no longer allocated for the silent stream. Clear the appropriate
flag in the hdmi_pcm_open() function. The silent stream setup may
be applied in hdmi_pcm_close() (and the error path - open fcn) again.

If the flag is not cleared, the reuse conditions for the silent
stream converter in hdmi_choose_cvt() may improperly share
this converter.

Cc: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@...ex.cz>
Link: https://lore.kernel.org/r/20220913070216.3233974-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/pci/hda/patch_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 71e11481ba41..64f5192bcff8 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1257,6 +1257,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
 	set_bit(pcm_idx, &spec->pcm_in_use);
 	per_pin = get_pin(spec, pin_idx);
 	per_pin->cvt_nid = per_cvt->cvt_nid;
+	per_pin->silent_stream = false;
 	hinfo->nid = per_cvt->cvt_nid;
 
 	/* flip stripe flag for the assigned stream if supported */
-- 
2.35.1