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>

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index d486908d4e0e..f395bbc7c354 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;