From: Pavel Shilovsky <pshilov@microsoft.com>
Date: Fri, 18 Jan 2019 15:54:34 -0800
Subject: [PATCH] CIFS: Do not consider -ENODATA as stat failure for reads
Git-commit: 082aaa8700415f6471ec9c5ef0c8307ca214989a
Patch-mainline: v5.0-rc5
References: bsc#1144333

When doing reads beyound the end of a file the server returns
error STATUS_END_OF_FILE error which is mapped to -ENODATA.
Currently we report it as a failure which confuses read stats.
Change it to not consider -ENODATA as failure for stat purposes.

Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
 fs/cifs/smb2pdu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index d858dc04fdc3..ef52d6642431 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3241,7 +3241,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
 		rdata->mr = NULL;
 	}
 #endif
-	if (rdata->result) {
+	if (rdata->result && rdata->result != -ENODATA) {
 		cifs_stats_fail_inc(tcon, SMB2_READ_HE);
 		trace_smb3_read_err(0 /* xid */,
 				    rdata->cfile->fid.persistent_fid,
-- 
2.16.4