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dmaengine: img-mdc: fix a possible NULL dereference 

of_match_device could return NULL, and so cause a NULL pointer
dereference later at line 850:
mdma->soc = match->data;

For fixing this problem, we use of_device_get_match_data(), this will
simplify the code a little by using a standard function for
getting the match data.

This was reported by coverity (CID 1324134)

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
LABBE Corentin 2016-08-16 10:44:18 +02:00 committed by Vinod Koul
parent 6a8b0c6b18
commit 32e80820de
1 changed files with 1 additions and 3 deletions
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4
drivers/dma/img-mdc-dma.c
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@ -861,7 +861,6 @@ static int mdc_dma_probe(struct platform_device *pdev)
{
struct mdc_dma *mdma;
struct resource *res;
const struct of_device_id *match;
unsigned int i;
u32 val;
int ret;
@ -871,8 +870,7 @@ static int mdc_dma_probe(struct platform_device *pdev)
return -ENOMEM;
platform_set_drvdata(pdev, mdma);
match = of_match_device(mdc_dma_of_match, &pdev->dev);
mdma->soc = match->data;
mdma->soc = of_device_get_match_data(&pdev->dev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mdma->regs = devm_ioremap_resource(&pdev->dev, res);