[PATCH 07/26] staging/lustre/ldlm: refine LU-2665 patch for POSIX compliance

[Peng Tao <bergwolf@gmail.com>]

From: Bruno Faccini <bruno.faccini@intel.com>

Follow-on to patch introduced to fix LU-2665 ticket (Gerrit
Change at http://review.whamcloud.com/6415 with Change-Id:
I8faa331712abeadee46eabe111ee1c23a05840d5).
Original patch introduced regressions against POSIX test suite
(fcntl.18/fcntl.35 tests in LSB-VSX POSIX test suite at
http://www.opengroup.org/testing/linux-test/lsb-vsx.html),
so the idea is to only resend F_UNLCKs to have both LU-2665 bug
and POSIX test suite happy.

Lustre-change: http://review.whamcloud.com/7453
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3701
Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Reviewed-by: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
---
 drivers/staging/lustre/lustre/mdc/mdc_locks.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/mdc/mdc_locks.c b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
index b5a3f26..2896147 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_locks.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_locks.c
@@ -882,7 +882,9 @@ resend:
 		   can not rely on caller and this mainly for F_UNLCKs
 		   (explicits or automatically generated by Kernel to clean
 		   current FLocks upon exit) that can't be trashed */
-		if ((rc == -EINTR) || (rc == -ETIMEDOUT))
+		if (((rc == -EINTR) || (rc == -ETIMEDOUT)) &&
+		    (einfo->ei_type == LDLM_FLOCK) &&
+		    (einfo->ei_mode == LCK_NL))
 			goto resend;
 		return rc;
 	}
-- 
1.7.9.5