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-rw-r--r--drivers/md/raid5.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 40e9396..17e0953 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4446,6 +4446,9 @@ static int raid5_check_reshape(mddev_t *mddev)
return -EINVAL; /* Cannot shrink array or change level yet */
if (mddev->delta_disks == 0)
return 0; /* nothing to do */
+ if (mddev->bitmap)
+ /* Cannot grow a bitmap yet */
+ return -EBUSY;
/* Can only proceed if there are plenty of stripe_heads.
* We need a minimum of one full stripe,, and for sensible progress
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