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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-06-17 23:48:22 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-06-24 19:01:00 +0300
commitd2a7de0b34cd255f23d4b7a7f065677f4b1c15f2 (patch)
tree7abc61c17cb165cd70783488655d0931b9b06149 /fs
parentdd1beb3d16f6a10683b84b89a4644065c43910f3 (diff)
downloadlinux-d2a7de0b34cd255f23d4b7a7f065677f4b1c15f2.tar.xz
NFS: Fix up O_DIRECT results
if we read or wrote something, we must report it Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Jeff Layton <jlayton@poochiereds.net> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/direct.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 979b3c4dee6a..c7326c2af2c3 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -353,10 +353,12 @@ static ssize_t nfs_direct_wait(struct nfs_direct_req *dreq)
result = wait_for_completion_killable(&dreq->completion);
+ if (!result) {
+ result = dreq->count;
+ WARN_ON_ONCE(dreq->count < 0);
+ }
if (!result)
result = dreq->error;
- if (!result)
- result = dreq->count;
out:
return (ssize_t) result;
@@ -386,8 +388,10 @@ static void nfs_direct_complete(struct nfs_direct_req *dreq, bool write)
if (dreq->iocb) {
long res = (long) dreq->error;
- if (!res)
+ if (dreq->count != 0) {
res = (long) dreq->count;
+ WARN_ON_ONCE(dreq->count < 0);
+ }
dreq->iocb->ki_complete(dreq->iocb, res, 0);
}