[v2] ASoC: imx-audmix: Add NULL check in imx_audmix_probe

[Charles Han <hanchunchao@xxxxxxxxxx>]

devm_kasprintf() can return a NULL pointer on failure,but this
returned value in imx_audmix_probe() is not checked.
Add NULL check in imx_audmix_probe(), to handle kernel NULL
pointer dereference error.

Fixes: 05d996e11348 ("ASoC: imx-audmix: Split capture device for audmix")
Signed-off-by: Charles Han <hanchunchao@xxxxxxxxxx>
---
 sound/soc/fsl/imx-audmix.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/fsl/imx-audmix.c b/sound/soc/fsl/imx-audmix.c
index dcf770b55c4b..231400661c90 100644
--- a/sound/soc/fsl/imx-audmix.c
+++ b/sound/soc/fsl/imx-audmix.c
@@ -274,6 +274,9 @@ static int imx_audmix_probe(struct platform_device *pdev)
 		/* Add AUDMIX Backend */
 		be_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 					 "audmix-%d", i);
+		if (!be_name)
+			return -ENOMEM;
+
 		priv->dai[num_dai + i].cpus	= &dlc[1];
 		priv->dai[num_dai + i].codecs	= &snd_soc_dummy_dlc;
 
-- 
2.31.1