RDMA/nes: Fixes for sparse endianness warnings

Fix endianness problems detect by sparse, introduced with the enhanced
MPA patch.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Faisal Latif <Faisal.Latif@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 22 insertions, 17 deletions

diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index a4972abedef1..da2c67db5ebb 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -338,18 +338,21 @@ static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
         case IETF_MPA_V2: {
                 u16 ird_size;
                 u16 ord_size;
+                u16 rtr_ctrl_ird;
+                u16 rtr_ctrl_ord;
+
                 mpa_v2_frame = (struct ietf_mpa_v2 *)buffer;
                 mpa_hdr_len += IETF_RTR_MSG_SIZE;
                 cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE;
                 rtr_msg = &mpa_v2_frame->rtr_msg;
 
                 /* parse rtr message */
-                rtr_msg->ctrl_ird = ntohs(rtr_msg->ctrl_ird);
-                rtr_msg->ctrl_ord = ntohs(rtr_msg->ctrl_ord);
-                ird_size = rtr_msg->ctrl_ird & IETF_NO_IRD_ORD;
-                ord_size = rtr_msg->ctrl_ord & IETF_NO_IRD_ORD;
+                rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird);
+                rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord);
+                ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD;
+                ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD;
 
-                if (!(rtr_msg->ctrl_ird & IETF_PEER_TO_PEER)) {
+                if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) {
                         /* send reset */
                         return -EINVAL;
                 }
@@ -370,9 +373,9 @@ static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type,
                         }
                 }
 
-                if (rtr_msg->ctrl_ord & IETF_RDMA0_READ) {
+                if (rtr_ctrl_ord & IETF_RDMA0_READ) {
                         cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO;
-                } else if (rtr_msg->ctrl_ord & IETF_RDMA0_WRITE) {
+                } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) {
                         cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO;
                 } else {        /* Not supported RDMA0 operation */
                         return -EINVAL;
@@ -543,6 +546,8 @@ static void build_mpa_v2(struct nes_cm_node *cm_node,
 {
         struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr;
         struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg;
+        u16 ctrl_ird;
+        u16 ctrl_ord;
 
         /* initialize the upper 5 bytes of the frame */
         build_mpa_v1(cm_node, start_addr, mpa_key);
@@ -550,31 +555,31 @@ static void build_mpa_v2(struct nes_cm_node *cm_node,
         mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE);
 
         /* initialize RTR msg */
-        rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
+        ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ?
                             IETF_NO_IRD_ORD : cm_node->ird_size;
-        rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
+        ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ?
                             IETF_NO_IRD_ORD : cm_node->ord_size;
 
-        rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER;
-        rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN;
+        ctrl_ird |= IETF_PEER_TO_PEER;
+        ctrl_ird |= IETF_FLPDU_ZERO_LEN;
 
         switch (mpa_key) {
         case MPA_KEY_REQUEST:
-                rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
-                rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
+                ctrl_ord |= IETF_RDMA0_WRITE;
+                ctrl_ord |= IETF_RDMA0_READ;
                 break;
         case MPA_KEY_REPLY:
                 switch (cm_node->send_rdma0_op) {
                 case SEND_RDMA_WRITE_ZERO:
-                        rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE;
+                        ctrl_ord |= IETF_RDMA0_WRITE;
                         break;
                 case SEND_RDMA_READ_ZERO:
-                        rtr_msg->ctrl_ord |= IETF_RDMA0_READ;
+                        ctrl_ord |= IETF_RDMA0_READ;
                         break;
                 }
         }
-        rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird);
-        rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord);
+        rtr_msg->ctrl_ird = htons(ctrl_ird);
+        rtr_msg->ctrl_ord = htons(ctrl_ord);
 }
 
 /**