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dma-buf: Fix static checker warning

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Here is the warning message:

	drivers/dma-buf/dma-buf.c:917 dma_buf_map_attachment()
	error: 'sg_table' dereferencing possible ERR_PTR()

Fix by adding error checking before dereferencing the pointer.

Fixes: ac80cd17a6 ("dma-buf: Clarify that dma-buf sg lists are page aligned")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/398485/
This commit is contained in:
Jianxin Xiong 2020-11-02 19:51:58 -08:00 committed by Christian König
parent 2b5b95b1ff
commit 00efd65a65
1 changed files with 1 additions and 1 deletions
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2
drivers/dma-buf/dma-buf.c
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@ -908,7 +908,7 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach,
}
#ifdef CONFIG_DMA_API_DEBUG
{
if (!IS_ERR(sg_table)) {
struct scatterlist *sg;
u64 addr;
int len;