linux-kernel - [PATCH] ALSA: intel_hdmi: Check for error num after setting mask

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Message-Id: <20220106012428.2504003-1-jiasheng@iscas.ac.cn>
Date:   Thu,  6 Jan 2022 09:24:28 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     perex@...ex.cz, tiwai@...e.com, leon@...nel.org,
        broonie@...nel.org, joe@...ches.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] ALSA: intel_hdmi: Check for error num after setting mask

As the dma_supported() may fail, the dma_set_mask_and_coherent() may
fail too.
Therefore, it should be better to check it and return error if fails.

Fixes: da8648097497 ("ALSA: x86: Flatten two abstraction layers")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 sound/x86/intel_hdmi_audio.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index 33b12aa67cf5..6caea517f07f 100644
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -1770,7 +1770,9 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
 	card_ctx->irq = irq;
 
 	/* only 32bit addressable */
-	dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		goto err;
 
 	init_channel_allocations();
 
-- 
2.25.1