linux-kernel - [PATCH 1/8] ASoC: amd: acp: add a null check for chip

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Date: Mon, 17 Jun 2024 12:58:34 +0530
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
To: <broonie@...nel.org>
CC: <alsa-devel@...a-project.org>, <venkataprasad.potturu@....com>,
	<Basavaraj.Hiregoudar@....com>, <Sunil-kumar.Dommati@....com>, "Vijendar
 Mukunda" <Vijendar.Mukunda@....com>, Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, "Syed Saba
 Kareem" <Syed.SabaKareem@....com>, "open list:SOUND - SOC LAYER / DYNAMIC
 AUDIO POWER MANAGEM..." <linux-sound@...r.kernel.org>, open list
	<linux-kernel@...r.kernel.org>
Subject: [PATCH 1/8] ASoC: amd: acp: add a null check for chip_pdev structure

When acp platform device creation is skipped, chip->chip_pdev value will
remain NULL. Add NULL check for chip->chip_pdev structure in
snd_acp_resume() function to avoid null pointer dereference.

Fixes: 088a40980efb ("ASoC: amd: acp: add pm ops support for acp pci driver")
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/acp/acp-pci.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c
index ad320b29e87d..aa3e72d13451 100644
--- a/sound/soc/amd/acp/acp-pci.c
+++ b/sound/soc/amd/acp/acp-pci.c
@@ -199,10 +199,12 @@ static int __maybe_unused snd_acp_resume(struct device *dev)
 	ret = acp_init(chip);
 	if (ret)
 		dev_err(dev, "ACP init failed\n");
-	child = chip->chip_pdev->dev;
-	adata = dev_get_drvdata(&child);
-	if (adata)
-		acp_enable_interrupts(adata);
+	if (chip->chip_pdev) {
+		child = chip->chip_pdev->dev;
+		adata = dev_get_drvdata(&child);
+		if (adata)
+			acp_enable_interrupts(adata);
+	}
 	return ret;
 }
 
-- 
2.34.1