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MD RAID10: Prep for DM RAID10 device replacement capability

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MD RAID10:  Fix a couple potential kernel panics if RAID10 is used by dm-raid

When device-mapper uses the RAID10 personality through dm-raid.c, there is no
'gendisk' structure in mddev and some sysfs information is also not populated.

This patch avoids touching those non-existent structures.

Signed-off-by: Jonathan Brassow <jbrassow@rehdat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Jonathan Brassow
2012-10-11 13:38:58 +11:00
committed by NeilBrown
parent 1ca69c4bc4
commit 2863b9eb44
2 changed files with 9 additions and 3 deletions
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10
drivers/md/md.c
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@@ -2044,8 +2044,14 @@ EXPORT_SYMBOL(md_integrity_register);
/* Disable data integrity if non-capable/non-matching disk is being added */
void md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev)
{
struct blk_integrity *bi_rdev = bdev_get_integrity(rdev->bdev);
struct blk_integrity *bi_mddev = blk_get_integrity(mddev->gendisk);
struct blk_integrity *bi_rdev;
struct blk_integrity *bi_mddev;
if (!mddev->gendisk)
return;
bi_rdev = bdev_get_integrity(rdev->bdev);
bi_mddev = blk_get_integrity(mddev->gendisk);
if (!bi_mddev) /* nothing to do */
return;