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| author | NeilBrown <neilb@cse.unsw.edu.au> | 2005-09-10 01:23:52 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-10 01:39:11 +0200 |
| commit | ab904d634625ef8dc590240b7ee06c7b724e636b (patch) | |
| tree | 3ecd6a17dd99f2f1879b3e1fed58f52e6d35633c /drivers/md/bitmap.c | |
| parent | [PATCH] md: allow md to load a superblock with feature-bit '1' set (diff) | |
| download | linux-ab904d634625ef8dc590240b7ee06c7b724e636b.tar.xz linux-ab904d634625ef8dc590240b7ee06c7b724e636b.zip | |
[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 <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 19 |
1 files 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) |