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dmaengine: fsl-edma: use struct_size() in kzalloc()
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Tested-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Vinod Koul <vkoul@kernel.org>
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1 changed files with 1 additions and 3 deletions
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@ -339,9 +339,7 @@ static struct fsl_edma_desc *fsl_edma_alloc_desc(struct fsl_edma_chan *fsl_chan,
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struct fsl_edma_desc *fsl_desc;
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int i;
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fsl_desc = kzalloc(sizeof(*fsl_desc) +
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sizeof(struct fsl_edma_sw_tcd) *
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sg_len, GFP_NOWAIT);
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fsl_desc = kzalloc(struct_size(fsl_desc, tcd, sg_len), GFP_NOWAIT);
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if (!fsl_desc)
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return NULL;
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