Commit 0c098220 authored May 22, 2012 by Yuanhan Liu Committed by NeilBrown May 22, 2012

md: check the return of mddev_find()



Check the return of mddev_find(), since it may fail due to out of
memeory or out of usable minor number.

The reason I chose -ENODEV instead of -ENOMEM or something else is
md_alloc() function chose that ;)

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent 4f0a5e01

drivers/md/md.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -6618,6 +6618,9 @@ static int md_open(struct block_device *bdev, fmode_t mode)
		struct mddev *mddev = mddev_find(bdev->bd_dev);
		int err;

		if (!mddev)
		return -ENODEV;

		if (mddev->gendisk != bdev->bd_disk) {
		/* we are racing with mddev_put which is discarding this
		* bd_disk.