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md: raid0: Make raid0_run() return a proper error code. 

Currently raid0_run() always returns -ENOMEM on errors. This is
incorrect as running the array might fail for other reasons, for
example because not all component devices were available.

This patch changes create_strip_zones() so that it returns a proper
error code (either -ENOMEM or -EINVAL) rather than 1 on errors and
makes raid0_run(), its single caller, return that value instead
of -ENOMEM.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Andre Noll 2009-06-16 16:47:21 +10:00 committed by NeilBrown
parent 8f79cfcdb6
commit 5568a6035d
1 changed files with 9 additions and 8 deletions
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17
drivers/md/raid0.c
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@ -105,12 +105,12 @@ static int create_strip_zones (mddev_t *mddev)
conf->strip_zone = kzalloc(sizeof(struct strip_zone)*
conf->nr_strip_zones, GFP_KERNEL);
if (!conf->strip_zone)
return 1;
return -ENOMEM;
conf->devlist = kzalloc(sizeof(mdk_rdev_t*)*
conf->nr_strip_zones*mddev->raid_disks,
GFP_KERNEL);
if (!conf->devlist)
return 1;
return -ENOMEM;
/* The first zone must contain all devices, so here we check that
* there is a proper alignment of slots to devices and find them all
@ -207,8 +207,8 @@ static int create_strip_zones (mddev_t *mddev)
printk(KERN_INFO "raid0: done.\n");
return 0;
abort:
return 1;
abort:
return -EINVAL;
}
/**
@ -254,6 +254,7 @@ static sector_t raid0_size(mddev_t *mddev, sector_t sectors, int raid_disks)
static int raid0_run(mddev_t *mddev)
{
raid0_conf_t *conf;
int ret;
if (mddev->chunk_size == 0) {
printk(KERN_ERR "md/raid0: non-zero chunk size required.\n");
@ -269,12 +270,13 @@ static int raid0_run(mddev_t *mddev)
conf = kmalloc(sizeof (raid0_conf_t), GFP_KERNEL);
if (!conf)
goto out;
return -ENOMEM;
mddev->private = (void *)conf;
conf->strip_zone = NULL;
conf->devlist = NULL;
if (create_strip_zones (mddev))
ret = create_strip_zones(mddev);
if (ret < 0)
goto out_free_conf;
/* calculate array device size */
@ -306,8 +308,7 @@ out_free_conf:
kfree(conf->devlist);
kfree(conf);
mddev->private = NULL;
out:
return -ENOMEM;
return ret;
}
static int raid0_stop (mddev_t *mddev)