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Fix kernel module refcount handling 

md loads raidX modules and increments module refcount each time level
has changed but does not decrement it. You are unable to unload raid0
module after reshape because raid0 reshape changes level to raid4
and back to raid0.

Signed-off-by: Aleksey Obitotskiy <aleksey.obitotskiy@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
steinar/wifi_calib_4_9_kernel
Alexey Obitotskiy 2016-06-23 12:11:01 +02:00 committed by Shaohua Li
parent 0e3ef49eda
commit 4cb9da7d9c
1 changed files with 2 additions and 0 deletions
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2
drivers/md/md.c
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@ -3579,6 +3579,8 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
mddev->to_remove = &md_redundancy_group;
}
module_put(oldpers->owner);
rdev_for_each(rdev, mddev) {
if (rdev->raid_disk < 0)
continue;