Have nfs ->d_revalidate() report errors properly

	If nfs atomic open implementation ends up doing open request from
->d_revalidate() codepath and gets an error from server, return that error
to caller explicitly and don't bother with lookup_instantiate_filp() at all.
->d_revalidate() can return an error itself just fine...

See
	http://bugzilla.kernel.org/show_bug.cgi?id=15674
	http://marc.info/?l=linux-kernel&m=126988782722711&w=2

for original report.

Reported-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d79a7b37e56c..fe0cd9eb1d4d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2068,8 +2068,7 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st
                         case -EDQUOT:
                         case -ENOSPC:
                         case -EROFS:
-                                lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
-                                return 1;
+                                return PTR_ERR(state);
                         default:
                                 goto out_drop;
                 }