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Commit 7f0f0d87 authored by NeilBrown's avatar NeilBrown Committed by Shaohua Li
Browse files

md: fix some issues with alloc_disk_sb() 



1/ don't print a warning if allocation fails.
 page_alloc() does that already.
2/ always check return status for error.

Signed-off-by: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent cbb38732

drivers/md/md.c

+10 −10
Original line number Diff line number Diff line
@@ -684,11 +684,8 @@ static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) 
static int alloc_disk_sb(struct md_rdev *rdev)

{

	rdev->sb_page = alloc_page(GFP_KERNEL);

	if (!rdev->sb_page) {

		printk(KERN_ALERT "md: out of memory.\n");

	if (!rdev->sb_page)

		return -ENOMEM;

	}



	return 0;

}
@@ -8788,14 +8785,17 @@ static int read_rdev(struct mddev *mddev, struct md_rdev *rdev) 
	 * variable in case we err in the future

	 */

	rdev->sb_page = NULL;

	alloc_disk_sb(rdev);

	err = alloc_disk_sb(rdev);

	if (err == 0) {

		ClearPageUptodate(rdev->sb_page);

		rdev->sb_loaded = 0;

	err = super_types[mddev->major_version].load_super(rdev, NULL, mddev->minor_version);



		err = super_types[mddev->major_version].

			load_super(rdev, NULL, mddev->minor_version);

	}

	if (err < 0) {

		pr_warn("%s: %d Could not reload rdev(%d) err: %d. Restoring old values\n",

				__func__, __LINE__, rdev->desc_nr, err);

		if (rdev->sb_page)

			put_page(rdev->sb_page);

		rdev->sb_page = swapout;

		rdev->sb_loaded = 1;