[PATCH] md: add error reporting to superblock write failure
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 40cb79a..38a0a57 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -389,8 +389,12 @@
if (bio->bi_size)
return 1;
- if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags))
+ if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags)) {
+ printk("md: super_written gets error=%d, uptodate=%d\n",
+ error, test_bit(BIO_UPTODATE, &bio->bi_flags));
+ WARN_ON(test_bit(BIO_UPTODATE, &bio->bi_flags));
md_error(mddev, rdev);
+ }
if (atomic_dec_and_test(&mddev->pending_writes))
wake_up(&mddev->sb_wait);