From: Fedor Pchelkin <[email protected]>
[ Upstream commit f7c9ccaadffd13066353332c13d7e9bf73b8f92d ]
If do_map_benchmark() has failed, there is nothing useful to copy back
to userspace.
Suggested-by: Barry Song <[email protected]>
Signed-off-by: Fedor Pchelkin <[email protected]>
Acked-by: Robin Murphy <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
kernel/dma/map_benchmark.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/dma/map_benchmark.c b/kernel/dma/map_benchmark.c
index 0520a8f4fb1df..30ebfbf756847 100644
--- a/kernel/dma/map_benchmark.c
+++ b/kernel/dma/map_benchmark.c
@@ -252,6 +252,9 @@ static long map_benchmark_ioctl(struct file *file, unsigned int cmd,
* dma_mask changed by benchmark
*/
dma_set_mask(map->dev, old_dma_mask);
+
+ if (ret)
+ return ret;
break;
default:
return -EINVAL;
--
2.43.0