The current behaviour is to fall back to allocate
bio from 'fs_bio_set', that isn't a correct way
because it might cause deadlock.
So this patch simply return failure if mddev->bio_set
can't be created.
Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
drivers/md/md.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4c1b82defa78..3425c2b779a6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5270,8 +5270,11 @@ int md_run(struct mddev *mddev)
sysfs_notify_dirent_safe(rdev->sysfs_state);
}
- if (mddev->bio_set == NULL)
+ if (mddev->bio_set == NULL) {
mddev->bio_set = bioset_create(BIO_POOL_SIZE, 0);
+ if (!mddev->bio_set)
+ return -ENOMEM;
+ }
spin_lock(&pers_lock);
pers = find_pers(mddev->level, mddev->clevel);
--
2.7.4
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