[PATCH 4.4 020/124] RDMA/mad: Convert BUG_ONs to error flows

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Leon Romanovsky <leonro@xxxxxxxxxxxx>

[ Upstream commit 2468b82d69e3a53d024f28d79ba0fdb8bf43dfbf ]

Let's perform checks in-place instead of BUG_ONs.

Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/infiniband/core/mad.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -1548,7 +1548,8 @@ static int add_oui_reg_req(struct ib_mad
 			    mad_reg_req->oui, 3)) {
 			method = &(*vendor_table)->vendor_class[
 						vclass]->method_table[i];
-			BUG_ON(!*method);
+			if (!*method)
+				goto error3;
 			goto check_in_use;
 		}
 	}
@@ -1558,10 +1559,12 @@ static int add_oui_reg_req(struct ib_mad
 				vclass]->oui[i])) {
 			method = &(*vendor_table)->vendor_class[
 				vclass]->method_table[i];
-			BUG_ON(*method);
 			/* Allocate method table for this OUI */
-			if ((ret = allocate_method_table(method)))
-				goto error3;
+			if (!*method) {
+				ret = allocate_method_table(method);
+				if (ret)
+					goto error3;
+			}
 			memcpy((*vendor_table)->vendor_class[vclass]->oui[i],
 			       mad_reg_req->oui, 3);
 			goto check_in_use;