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md: fail if mddev->bio_set can't be created

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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.

Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Shaohua Li <[email protected]>
This commit is contained in:
Ming Lei 2017-02-14 23:29:00 +08:00 • committed by Shaohua Li
commit 10273170fd
1 changed files with 4 additions and 1 deletions
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5
drivers/md/md.c
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@ -5228,8 +5228,11 @@ 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);