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rationalise return value for ->hot_add_disk method.

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For all array types but linear, ->hot_add_disk returns 1 on
success, 0 on failure.
For linear, it returns 0 on success and -errno on failure.

This doesn't cause a functional problem because the ->hot_add_disk
function of linear is used quite differently to the others.
However it is confusing.

So convert all to return 0 for success or -errno on failure
and fix call sites to match.

Signed-off-by: Neil Brown <neilb@suse.de>
This commit is contained in:
Neil Brown
2008-06-28 08:31:33 +10:00
parent 6c2fce2ef6
commit 199050ea1f
5 changed files with 21 additions and 20 deletions
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7
drivers/md/md.c
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@@ -1977,10 +1977,8 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len)
rdev->saved_raid_disk = -1;
err = rdev->mddev->pers->
hot_add_disk(rdev->mddev, rdev);
if (err != 1) {
if (err) {
rdev->raid_disk = -1;
if (err == 0)
return -EEXIST;
return err;
}
sprintf(nm, "rd%d", rdev->raid_disk);
@@ -5920,7 +5918,8 @@ static int remove_and_add_spares(mddev_t *mddev)
if (rdev->raid_disk < 0
&& !test_bit(Faulty, &rdev->flags)) {
rdev->recovery_offset = 0;
if (mddev->pers->hot_add_disk(mddev,rdev)) {
if (mddev->pers->
hot_add_disk(mddev, rdev) == 0) {
char nm[20];
sprintf(nm, "rd%d", rdev->raid_disk);
if (sysfs_create_link(&mddev->kobj,