IB/iser: Fix sparse warnings

Use uintptr_t to handle wr_id casting, which was found by Kbuild test
robot and smatch.  Also remove an internal definition of variable which
potentially shadows an external one (and make sparse happy).

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c
index 6c5ce35..5796c95 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_memory.c
+++ b/drivers/infiniband/ulp/iser/iser_memory.c
@@ -73,7 +73,6 @@ static int iser_start_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
 
        if (cmd_dir == ISER_DIR_OUT) {
                /* copy the unaligned sg the buffer which is used for RDMA */
-               int i;
                char *p, *from;
 
                sgl = (struct scatterlist *)data->buf;

diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 583b09e..fb5ec35 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -1077,7 +1077,7 @@ int iser_post_recvl(struct iser_conn *iser_conn)
        sge.length = ISER_RX_LOGIN_SIZE;
        sge.lkey   = ib_conn->device->mr->lkey;
 
-       rx_wr.wr_id   = (unsigned long)iser_conn->login_resp_buf;
+       rx_wr.wr_id   = (uintptr_t)iser_conn->login_resp_buf;
        rx_wr.sg_list = &sge;
        rx_wr.num_sge = 1;
        rx_wr.next    = NULL;
@@ -1101,7 +1101,7 @@ int iser_post_recvm(struct iser_conn *iser_conn, int count)
 
        for (rx_wr = ib_conn->rx_wr, i = 0; i < count; i++, rx_wr++) {
                rx_desc         = &iser_conn->rx_descs[my_rx_head];
-               rx_wr->wr_id    = (unsigned long)rx_desc;
+               rx_wr->wr_id    = (uintptr_t)rx_desc;
                rx_wr->sg_list  = &rx_desc->rx_sg;
                rx_wr->num_sge  = 1;
                rx_wr->next     = rx_wr + 1;
@@ -1138,7 +1138,7 @@ int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc,
                                      DMA_TO_DEVICE);
 
        send_wr.next       = NULL;
-       send_wr.wr_id      = (unsigned long)tx_desc;
+       send_wr.wr_id      = (uintptr_t)tx_desc;
        send_wr.sg_list    = tx_desc->tx_sg;
        send_wr.num_sge    = tx_desc->num_sge;
        send_wr.opcode     = IB_WR_SEND;
@@ -1188,6 +1188,7 @@ static void
 iser_handle_comp_error(struct ib_conn *ib_conn,
                       struct ib_wc *wc)
 {
+       void *wr_id = (void *)(uintptr_t)wc->wr_id;
        struct iser_conn *iser_conn = container_of(ib_conn, struct iser_conn,
                                                   ib_conn);
 
@@ -1196,8 +1197,8 @@ iser_handle_comp_error(struct ib_conn *ib_conn,
                        iscsi_conn_failure(iser_conn->iscsi_conn,
                                           ISCSI_ERR_CONN_FAILED);
 
-       if (is_iser_tx_desc(iser_conn, (void *)wc->wr_id)) {
-               struct iser_tx_desc *desc = (struct iser_tx_desc *)wc->wr_id;
+       if (is_iser_tx_desc(iser_conn, wr_id)) {
+               struct iser_tx_desc *desc = wr_id;
 
                if (desc->type == ISCSI_TX_DATAOUT)
                        kmem_cache_free(ig.desc_cache, desc);
@@ -1223,12 +1224,12 @@ static void iser_handle_wc(struct ib_wc *wc)
        ib_conn = wc->qp->qp_context;
        if (wc->status == IB_WC_SUCCESS) {
                if (wc->opcode == IB_WC_RECV) {
-                       rx_desc = (struct iser_rx_desc *)wc->wr_id;
+                       rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id;
                        iser_rcv_completion(rx_desc, wc->byte_len,
                                            ib_conn);
                } else
                if (wc->opcode == IB_WC_SEND) {
-                       tx_desc = (struct iser_tx_desc *)wc->wr_id;
+                       tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id;
                        iser_snd_completion(tx_desc, ib_conn);
                } else {
                        iser_err("Unknown wc opcode %d\n", wc->opcode);