staging: lustre: lmv: Ensure lmv_intent_lookup cleans up reqp

Ensure there aren't invalid pointers hanging around after
ptlrpc_req_finished is called.
Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4826
Reviewed-on: http://review.whamcloud.com/9841Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/lmv/lmv_intent.c

@@ -464,6 +464,9 @@ static int lmv_intent_lookup(struct obd_export *exp,
 			return PTR_ERR(tgt);
 
 		ptlrpc_req_finished(*reqp);
+		it->it_request = NULL;
+		*reqp = NULL;
+
 		CDEBUG(D_INODE, "For migrating dir, try target dir "DFID"\n",
 		       PFID(&lsm->lsm_md_oinfo[1].lmo_fid));