media: davinci: vpif_capture: add NULL check on devm_kzalloc return value

Check return value from call to devm_kzalloc() in order to prevent
a NULL pointer dereference.

This issue was detected with the help of Coccinelle.

Fixes: 4a5f8ae50b66 ("[media] davinci: vpif_capture: get subdevs from DT when available")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/davinci/vpif_capture.c b/drivers/media/platform/davinci/vpif_capture.c
index fca4dc829f73eeb0eb9a1c191fc6daae940587a9..e45916f69defe1604160d2915bd4db1b88499b07 100644 (file)
--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1550,6 +1550,8 @@ vpif_capture_get_pdata(struct platform_device *pdev)
                                            sizeof(*chan->inputs) *
                                            VPIF_CAPTURE_NUM_CHANNELS,
                                            GFP_KERNEL);
+               if (!chan->inputs)
+                       return NULL;
 
                chan->input_count++;
                chan->inputs[i].input.type = V4L2_INPUT_TYPE_CAMERA;