From 7f59203abeaf18bf3497b308891f95a4489810ad Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 27 Jan 2010 02:09:00 +0000 Subject: [PATCH] Btrfs: check return value of open_bdev_exclusive properly Hit this problem while testing RAID1 failure stuff. open_bdev_exclusive returns ERR_PTR(), not NULL. So change the return value properly. This is important if you accidently specify a device that doesn't exist when trying to add a new device to an array, you will panic the box dereferencing bdev. Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/volumes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 66122bdf8bbf..5eb7459e3782 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1434,8 +1434,8 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path) return -EINVAL; bdev = open_bdev_exclusive(device_path, 0, root->fs_info->bdev_holder); - if (!bdev) - return -EIO; + if (IS_ERR(bdev)) + return PTR_ERR(bdev); if (root->fs_info->fs_devices->seeding) { seeding_dev = 1;