dma: ste_dma40: Fix potential null pointer dereference
authorSachin Kamat <sachin.kamat@linaro.org>
Mon, 2 Sep 2013 08:14:59 +0000 (13:44 +0530)
committerVinod Koul <vinod.koul@intel.com>
Mon, 2 Sep 2013 12:06:00 +0000 (17:36 +0530)
kcalloc can return NULL. Check the pointer before dereferencing.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/ste_dma40.c

index df0a606..82d2b97 100644 (file)
@@ -2591,6 +2591,9 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
        int i;
 
        sg = kcalloc(periods + 1, sizeof(struct scatterlist), GFP_NOWAIT);
+       if (!sg)
+               return NULL;
+
        for (i = 0; i < periods; i++) {
                sg_dma_address(&sg[i]) = dma_addr;
                sg_dma_len(&sg[i]) = period_len;