From 137b388b07d1289f02dea427020e85f7c45d9a7e Mon Sep 17 00:00:00 2001 From: Jonathan Brassow Date: Mon, 24 Sep 2012 16:41:28 +1000 Subject: [PATCH] MD RAID10: Prep for DM RAID10 device replacement capability 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 Signed-off-by: NeilBrown --- drivers/md/md.c | 10 ++++++++-- drivers/md/raid10.c | 2 +- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index b1143dbdef88..f0494d4e7707 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2081,8 +2081,14 @@ 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; diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 39eef1a52614..c0aae01e806f 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1693,7 +1693,7 @@ static int raid10_spare_active(struct mddev *mddev) && !test_bit(Faulty, &tmp->rdev->flags) && !test_and_set_bit(In_sync, &tmp->rdev->flags)) { count++; - sysfs_notify_dirent(tmp->rdev->sysfs_state); + sysfs_notify_dirent_safe(tmp->rdev->sysfs_state); } } spin_lock_irqsave(&conf->device_lock, flags); -- 2.39.5