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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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10
drivers/md/raid10.c
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@@ -1113,7 +1113,7 @@ static int raid10_spare_active(mddev_t *mddev)
static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
{
conf_t *conf = mddev->private;
int found = 0;
int err = -EEXIST;
int mirror;
mirror_info_t *p;
int first = 0;
@@ -1123,9 +1123,9 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
/* only hot-add to in-sync arrays, as recovery is
* very different from resync
*/
return 0;
return -EBUSY;
if (!enough(conf))
return 0;
return -EINVAL;
if (rdev->raid_disk)
first = last = rdev->raid_disk;
@@ -1151,7 +1151,7 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
p->head_position = 0;
rdev->raid_disk = mirror;
found = 1;
err = 0;
if (rdev->saved_raid_disk != mirror)
conf->fullsync = 1;
rcu_assign_pointer(p->rdev, rdev);
@@ -1159,7 +1159,7 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
}
print_conf(conf);
return found;
return err;
}
static int raid10_remove_disk(mddev_t *mddev, int number)