From: Christophe Jaillet <christophe.jaillet@wanadoo.fr>
Date: Sun, 27 Aug 2017 06:46:50 +0000 (+0200)
Subject: ASoC: davinci-mcasp: check memory allocation failure
X-Git-Tag: v4.14-rc4~21^2~23^2~12^5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4243e0457c9b1fe5e96fba19296469466eb24b1d;p=platform%2Fkernel%2Flinux-exynos.git

ASoC: davinci-mcasp: check memory allocation failure

Check memory allocation failures and return -ENOMEM in such cases, as
already done above for another memory allocation.

This avoids NULL pointers dereference.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index d486908..f395bbc 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -1851,6 +1851,10 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
 	mcasp->context.xrsr_regs = devm_kzalloc(&pdev->dev,
 					sizeof(u32) * mcasp->num_serializer,
 					GFP_KERNEL);
+	if (!mcasp->context.xrsr_regs) {
+		ret = -ENOMEM;
+		goto err;
+	}
 #endif
 	mcasp->serial_dir = pdata->serial_dir;
 	mcasp->version = pdata->version;