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dmaengine: bcm2835: 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> Signed-off-by: Vinod Koul <vkoul@kernel.org>
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@ -312,8 +312,7 @@ static struct bcm2835_desc *bcm2835_dma_create_cb_chain(
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return NULL;
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/* allocate and setup the descriptor. */
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d = kzalloc(sizeof(*d) + frames * sizeof(struct bcm2835_cb_entry),
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gfp);
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d = kzalloc(struct_size(d, cb_list, frames), gfp);
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if (!d)
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return NULL;
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