Am 03.11.20 um 04:51 schrieb Jianxin Xiong:
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: ac80cd17a615 ("dma-buf: Clarify that dma-buf sg lists are page aligned")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jianxin Xiong <jianxin.xiong@xxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Do you have commit access to drm-misc-next or should I push it?
---
drivers/dma-buf/dma-buf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 556f62e..0eb80c1 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -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;
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