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Commit a757e64c authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
Browse files

[PATCH] md: remove a number of misleading calls to MD_BUG 



The conditions that cause these calls to MD_BUG are not kernel bugs, just
oddities in what userspace is asking for.

Also convert analyze_sbs to return void, and the value it returned was
always 0.

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 d28446fe

drivers/md/md.c

+8 −22
Original line number Diff line number Diff line
@@ -1387,7 +1387,7 @@ static mdk_rdev_t *md_import_device(dev_t newdev, int super_format, int super_mi 
 */





static int analyze_sbs(mddev_t * mddev)

static void analyze_sbs(mddev_t * mddev)

{

	int i;

	struct list_head *tmp;
@@ -1441,7 +1441,6 @@ static int analyze_sbs(mddev_t * mddev) 
		       " -- starting background reconstruction\n",

		       mdname(mddev));



	return 0;

}



int mdp_major = 0;
@@ -1508,10 +1507,9 @@ static int do_md_run(mddev_t * mddev) 
	struct gendisk *disk;

	char b[BDEVNAME_SIZE];



	if (list_empty(&mddev->disks)) {

		MD_BUG();

	if (list_empty(&mddev->disks))

		/* cannot run an array with no devices.. */

		return -EINVAL;

	}



	if (mddev->pers)

		return -EBUSY;
@@ -1519,10 +1517,8 @@ static int do_md_run(mddev_t * mddev) 
	/*

	 * Analyze all RAID superblock(s)

	 */

	if (!mddev->raid_disks && analyze_sbs(mddev)) {

		MD_BUG();

		return -EINVAL;

	}

	if (!mddev->raid_disks)

		analyze_sbs(mddev);



	chunk_size = mddev->chunk_size;

	pnum = level_to_pers(mddev->level);
@@ -1548,7 +1544,7 @@ static int do_md_run(mddev_t * mddev) 
		 * chunk-size has to be a power of 2 and multiples of PAGE_SIZE

		 */

		if ( (1 << ffz(~chunk_size)) != chunk_size) {

			MD_BUG();

			printk(KERN_ERR "chunk_size of %d not valid\n", chunk_size);

			return -EINVAL;

		}

		if (chunk_size < PAGE_SIZE) {
@@ -1573,11 +1569,6 @@ static int do_md_run(mddev_t * mddev) 
		}

	}



	if (pnum >= MAX_PERSONALITY) {

		MD_BUG();

		return -EINVAL;

	}



#ifdef CONFIG_KMOD

	if (!pers[pnum])

	{
@@ -1762,10 +1753,8 @@ static void autorun_array(mddev_t *mddev) 
	struct list_head *tmp;

	int err;



	if (list_empty(&mddev->disks)) {

		MD_BUG();

	if (list_empty(&mddev->disks))

		return;

	}



	printk(KERN_INFO "md: running: ");
@@ -3128,7 +3117,6 @@ int register_md_personality(int pnum, mdk_personality_t *p) 
	spin_lock(&pers_lock);

	if (pers[pnum]) {

		spin_unlock(&pers_lock);

		MD_BUG();

		return -EBUSY;

	}
@@ -3140,10 +3128,8 @@ int register_md_personality(int pnum, mdk_personality_t *p) 


int unregister_md_personality(int pnum)

{

	if (pnum >= MAX_PERSONALITY) {

		MD_BUG();

	if (pnum >= MAX_PERSONALITY)

		return -EINVAL;

	}



	printk(KERN_INFO "md: %s personality unregistered\n", pers[pnum]->name);

	spin_lock(&pers_lock);