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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-03-09 23:37:42 +0300 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-23 00:09:27 +0300 |
| commit | 9552e19f6fff86d9907bb088f8b1eb786562f9d3 (patch) | |
| tree | e9986f22d9b7d0d21f323d8a05264fe1f436e084 /fs/bcachefs/fs-io.c | |
| parent | 4d126dc8b30c2c1c69cbf600d604e7ceb8ca7f8d (diff) | |
| download | linux-9552e19f6fff86d9907bb088f8b1eb786562f9d3.tar.xz | |
bcachefs: Fix dio write path with loopback dio mode
When the iov_iter is a bvec iter, it's possible the IO was submitted
from a kthread that didn't have an mm to switch to.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Diffstat (limited to 'fs/bcachefs/fs-io.c')
| -rw-r--r-- | fs/bcachefs/fs-io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/bcachefs/fs-io.c b/fs/bcachefs/fs-io.c index 8231c29a7534..77a893260fd8 100644 --- a/fs/bcachefs/fs-io.c +++ b/fs/bcachefs/fs-io.c @@ -2110,7 +2110,7 @@ static long bch2_dio_write_loop(struct dio_write *dio) while (1) { iter_count = dio->iter.count; - if (kthread) + if (kthread && dio->mm) kthread_use_mm(dio->mm); BUG_ON(current->faults_disabled_mapping); current->faults_disabled_mapping = mapping; @@ -2120,7 +2120,7 @@ static long bch2_dio_write_loop(struct dio_write *dio) dropped_locks = fdm_dropped_locks(); current->faults_disabled_mapping = NULL; - if (kthread) + if (kthread && dio->mm) kthread_unuse_mm(dio->mm); /* |