[PATCH] xfs: Abort intent log item in xfs_iflush() upon error to get buf

[Shyam Kaushik <shyam@xxxxxxxxxxxxxxxxx>]

Looking at xfs_iflush(). If an IO fails, it is supposed to unlock the
inode by calling xfs_iflush_abort(), which will also remove it from
the AIL. This can also happen on reclaim of a dirty inode, and if so
we'll still reclaim the inode because reclaim assumes xfs_iflush()
cleans up properly. Which, apparently, it doesn't.

Fix xfs_iflush() buf get failure to remove intent log item.

Discovered-by: Dave Chinner <dchinner at redhat.com>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 96f606d..85414a6 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3374,8 +3374,9 @@ xfs_iflush(
        error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp,
XBF_TRYLOCK,
                               0);
        if (error || !bp) {
-               xfs_ifunlock(ip);
-               return error;
+               if (!bp)
+                       error = -EIO;
+               goto abort_out;
        }

        /*
--