Btrfs: skip checksum verification if IO error occurs
authorLiu Bo <bo.li.liu@oracle.com>
Fri, 14 Apr 2017 01:11:48 +0000 (18:11 -0700)
committerDavid Sterba <dsterba@suse.com>
Mon, 19 Jun 2017 16:26:03 +0000 (18:26 +0200)
commitef7cdac101602844a4179f7d2d9e26bd20a0edf9
tree7e6341f5838275051463269a12e6397fa7cd6aee
parente3d37faba2eb19a1d459917bbf54ac1c65711510
Btrfs: skip checksum verification if IO error occurs

Currently dio read also goes to verify checksum if -EIO has been returned,
although it usually fails on checksum, it's not necessary at all, we could
directly check if there is another copy to read.

And with this, the behavior of dio read is now consistent with that of
buffered read.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ use bool for uptodate ]
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/inode.c