From ab904d634625ef8dc590240b7ee06c7b724e636b Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 9 Sep 2005 16:23:52 -0700 Subject: [PATCH] [PATCH] md: fix bitmap/read_sb_page so that it handles errors properly. read_sb_page() assumed that if sync_page_io fails, the device would be marked faultly. However it isn't. So in the face of error, read_sb_page would loop forever. Redo the logic so that this cannot happen. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/bitmap.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index c971d38f3a05..90fe70d76a31 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -270,19 +270,20 @@ static struct page *read_sb_page(mddev_t *mddev, long offset, unsigned long inde if (!page) return ERR_PTR(-ENOMEM); - do { - ITERATE_RDEV(mddev, rdev, tmp) - if (rdev->in_sync && !rdev->faulty) - goto found; - return ERR_PTR(-EIO); - found: + ITERATE_RDEV(mddev, rdev, tmp) { + if (! rdev->in_sync || rdev->faulty) + continue; + target = (rdev->sb_offset << 1) + offset + index * (PAGE_SIZE/512); - } while (!sync_page_io(rdev->bdev, target, PAGE_SIZE, page, READ)); + if (sync_page_io(rdev->bdev, target, PAGE_SIZE, page, READ)) { + page->index = index; + return page; + } + } + return ERR_PTR(-EIO); - page->index = index; - return page; } static int write_sb_page(mddev_t *mddev, long offset, struct page *page, int wait)