linux-kernel - [PATCH] ASoC: mediatek: mt8195: Re-add codec entry for ETDM1_OUT

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Message-ID: <20240620092526.2353537-1-wenst@chromium.org>
Date: Thu, 20 Jun 2024 17:25:24 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Mark Brown <broonie@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	Trevor Wu <trevor.wu@...iatek.com>,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH] ASoC: mediatek: mt8195: Re-add codec entry for ETDM1_OUT_BE dai link

This partially reverts commit e70b8dd26711704b1ff1f1b4eb3d048ba69e29da.

Said commit removes the codec entry for the ETDM1_OUT_BE dai link for
some reason. This does not have the intended effect, as the remaining
DAILINK_COMP_ARRAY(COMP_EMPTY()) platform entry becomes the codec
entry, and the platform entry is completely gone.

This causes in a KASAN out-of-bounds warning in mtk_soundcard_common_probe()
in sound/soc/mediatek/common/mtk-soundcard-driver.c:

	for_each_card_prelinks(card, i, dai_link) {
		if (adsp_node && !strncmp(dai_link->name, "AFE_SOF", strlen("AFE_SOF")))
			dai_link->platforms->of_node = adsp_node;
		else if (!dai_link->platforms->name && !dai_link->platforms->of_node)
			dai_link->platforms->of_node = platform_node;
	}

where the code expects the platforms array to have space for at least one entry.

Re-add the entry so that dai_link->platforms has space.

Fixes: e70b8dd26711 ("ASoC: mediatek: mt8195: Remove afe-dai component and rework codec link")
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 sound/soc/mediatek/mt8195/mt8195-mt6359.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/mediatek/mt8195/mt8195-mt6359.c b/sound/soc/mediatek/mt8195/mt8195-mt6359.c
index ca8751190520..2832ef78eaed 100644
--- a/sound/soc/mediatek/mt8195/mt8195-mt6359.c
+++ b/sound/soc/mediatek/mt8195/mt8195-mt6359.c
@@ -827,6 +827,7 @@ SND_SOC_DAILINK_DEFS(ETDM2_IN_BE,
 
 SND_SOC_DAILINK_DEFS(ETDM1_OUT_BE,
 		     DAILINK_COMP_ARRAY(COMP_CPU("ETDM1_OUT")),
+		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
 		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
 SND_SOC_DAILINK_DEFS(ETDM2_OUT_BE,
-- 
2.45.2.741.gdbec12cfda-goog