diff options
| author | Fedor Pchelkin <pchelkin@ispras.ru> | 2024-05-04 14:47:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-11 12:51:21 +0200 |
| commit | 8108b176ea37fa86c1c2b25335eec8b9177a212a (patch) | |
| tree | e005d196e9f20bc6bb88cad8c6fcf35e7b865167 | |
| parent | f7b20274355ed8c00d98735a7d973d11dc703fb8 (diff) | |
dma-mapping: benchmark: avoid needless copy_to_user if benchmark fails
[ Upstream commit f7c9ccaadffd13066353332c13d7e9bf73b8f92d ]
If do_map_benchmark() has failed, there is nothing useful to copy back
to userspace.
Suggested-by: Barry Song <21cnbao@gmail.com>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/dma/map_benchmark.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/dma/map_benchmark.c b/kernel/dma/map_benchmark.c index f7f3d14fa69a..4950e0b622b1 100644 --- a/kernel/dma/map_benchmark.c +++ b/kernel/dma/map_benchmark.c @@ -256,6 +256,9 @@ 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; |