[lustre-devel] [PATCH 20/21] staging: lustre: fid: perform sanity checks before commiting

[NeilBrown]

When fid fetches a new range from the server, it commits
to it (*output = *out) *before* performing sanity checks.
This looks backwards.
Don't commit to a value until it has been found to be sane.

Signed-off-by: NeilBrown <neilb at suse.com>
---
 drivers/staging/lustre/lustre/fid/fid_request.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fid/fid_request.c b/drivers/staging/lustre/lustre/fid/fid_request.c
index 6e0dfe18ef5f..fa23423eb8b3 100644
--- a/drivers/staging/lustre/lustre/fid/fid_request.c
+++ b/drivers/staging/lustre/lustre/fid/fid_request.c
@@ -118,22 +118,22 @@ static int seq_client_rpc(struct lu_client_seq *seq,
 		goto out_req;
 
 	out = req_capsule_server_get(&req->rq_pill, &RMF_SEQ_RANGE);
-	*output = *out;
 
-	if (!lu_seq_range_is_sane(output)) {
+	if (!lu_seq_range_is_sane(out)) {
 		CERROR("%s: Invalid range received from server: "
-		       DRANGE "\n", seq->lcs_name, PRANGE(output));
+		       DRANGE "\n", seq->lcs_name, PRANGE(out));
 		rc = -EINVAL;
 		goto out_req;
 	}
 
-	if (lu_seq_range_is_exhausted(output)) {
+	if (lu_seq_range_is_exhausted(out)) {
 		CERROR("%s: Range received from server is exhausted: "
-		       DRANGE "]\n", seq->lcs_name, PRANGE(output));
+		       DRANGE "]\n", seq->lcs_name, PRANGE(out));
 		rc = -EINVAL;
 		goto out_req;
 	}
 
+	*output = *out;
 	CDEBUG_LIMIT(debug_mask, "%s: Allocated %s-sequence " DRANGE "]\n",
 		     seq->lcs_name, opcname, PRANGE(output));