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DMA: PL330: Check the pointer returned by kzalloc

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commit 61c6e7531d upstream.

kzalloc could return NULL. Hence add a check to avoid
NULL pointer dereference.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
[bwh: Backported to 3.2: adjust context and error label]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Sachin Kamat
2012-09-17 15:20:23 +05:30
committed by Ben Hutchings
parent d912bb414b
commit cd2ff82610
1 changed files with 5 additions and 0 deletions
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5
drivers/dma/pl330.c
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@ -858,6 +858,11 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
/* Initialize channel parameters */
num_chan = max(pdat ? pdat->nr_valid_peri : 0, (u8)pi->pcfg.num_chan);
pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
if (!pdmac->peripherals) {
ret = -ENOMEM;
dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n");
goto probe_err4;
}
for (i = 0; i < num_chan; i++) {
pch = &pdmac->peripherals[i];