Commit 7b1e35f6 authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds

[PATCH] md: allow hot-adding devices to arrays with non-persistant superblocks.

It is possibly (and occasionally useful) to have a raid1 without persistent
superblocks.  The code in add_new_disk for adding a device to such an array
always tries to read a superblock.

This will obviously fail.

So do the appropriate test and call md_import_device with
appropriate args.
Signed-off-by: default avatarNeil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3178b0db
......@@ -2226,8 +2226,11 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
mdname(mddev));
return -EINVAL;
}
rdev = md_import_device(dev, mddev->major_version,
mddev->minor_version);
if (mddev->persistent)
rdev = md_import_device(dev, mddev->major_version,
mddev->minor_version);
else
rdev = md_import_device(dev, -1, -1);
if (IS_ERR(rdev)) {
printk(KERN_WARNING
"md: md_import_device returned %ld\n",
......
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