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| author | Fedor Pchelkin <pchelkin@ispras.ru> | 2024-05-04 13:47:02 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2024-05-23 15:06:47 +0200 |
| commit | f7c9ccaadffd13066353332c13d7e9bf73b8f92d (patch) | |
| tree | 90120e56ef675342f2a2081b99e2ece9897331c9 /kernel | |
| parent | dma-mapping: benchmark: fix up kthread-related error handling (diff) | |
| download | linux-f7c9ccaadffd13066353332c13d7e9bf73b8f92d.tar.xz linux-f7c9ccaadffd13066353332c13d7e9bf73b8f92d.zip | |
dma-mapping: benchmark: avoid needless copy_to_user if benchmark fails
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>
Diffstat (limited to 'kernel')
| -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 2478957cf9f8..a6edb1ef98c8 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; |