From: NeilBrown 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 --- drivers/md/bitmap.c | 19 ++++++++++--------- 1 files changed, 10 insertions(+), 9 deletions(-) diff -puN drivers/md/bitmap.c~md-fix-bitmap-read_sb_page-so-that-it-handles-errors-properly drivers/md/bitmap.c --- devel/drivers/md/bitmap.c~md-fix-bitmap-read_sb_page-so-that-it-handles-errors-properly 2005-08-21 22:36:04.000000000 -0700 +++ devel-akpm/drivers/md/bitmap.c 2005-08-21 22:36:04.000000000 -0700 @@ -270,19 +270,20 @@ static struct page *read_sb_page(mddev_t 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) _