diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2022-03-09 15:37:42 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2022-10-03 22:52:14 -0400 |
| commit | 9f901d3da27bf672f0447a2775dbadd94ded2de7 (patch) | |
| tree | a6840aecef6a9bfdcdd25246ebf65be54fb52233 | |
| parent | 6eaa74141ead3dd17d3a98835960a3060f023ac5 (diff) | |
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>
| -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 9295a3d4ab7d..54fa02905e21 100644 --- a/fs/bcachefs/fs-io.c +++ b/fs/bcachefs/fs-io.c @@ -2085,7 +2085,7 @@ 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; @@ -2095,7 +2095,7 @@ 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); /* |