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md: raid5: add prerequisite to run underneath dm-raid 

In case md runs underneath the dm-raid target, the mddev does not have
a request queue or gendisk, thus avoid accesses.

This patch adds a missing conditional to the raid5 personality.

Signed-of-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Heinz Mauelshagen 2016-05-03 22:15:31 +02:00 committed by Shaohua Li
parent 859644f0fa
commit fe67d19a2d
1 changed files with 4 additions and 2 deletions
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6
drivers/md/raid5.c
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@ -7572,8 +7572,10 @@ static void raid5_finish_reshape(struct mddev *mddev)
if (mddev->delta_disks > 0) {
md_set_array_sectors(mddev, raid5_size(mddev, 0, 0));
set_capacity(mddev->gendisk, mddev->array_sectors);
revalidate_disk(mddev->gendisk);
if (mddev->queue) {
set_capacity(mddev->gendisk, mddev->array_sectors);
revalidate_disk(mddev->gendisk);
}
} else {
int d;
spin_lock_irq(&conf->device_lock);