RDMA/cxgb4: Address sparse warnings

Fixe the following types of sparse warnings
- cast to pointer from integer of different size
- cast from pointer to integer of different size
- incorrect type in assignment (different base types)
- incorrect type in argument 1 (different base types)
- cast from restricted __be64
- cast from restricted __be32

Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

2 files changed, 40 insertions, 31 deletions

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 37ea2fcf3b10..dfca515cc933 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -1492,11 +1492,11 @@ static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
                         V_FW_OFLD_CONNECTION_WR_ASTID(atid));
         req->tcb.cplrxdataack_cplpassacceptrpl =
                         htons(F_FW_OFLD_CONNECTION_WR_CPLRXDATAACK);
-        req->tcb.tx_max = jiffies;
+        req->tcb.tx_max = (__force __be32) jiffies;
         req->tcb.rcv_adv = htons(1);
         cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx);
         wscale = compute_wscale(rcv_win);
-        req->tcb.opt0 = TCAM_BYPASS(1) |
+        req->tcb.opt0 = (__force __be64) (TCAM_BYPASS(1) |
                 (nocong ? NO_CONG(1) : 0) |
                 KEEP_ALIVE(1) |
                 DELACK(1) |
@@ -1507,20 +1507,20 @@ static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
                 SMAC_SEL(ep->smac_idx) |
                 DSCP(ep->tos) |
                 ULP_MODE(ULP_MODE_TCPDDP) |
-                RCV_BUFSIZ(rcv_win >> 10);
-        req->tcb.opt2 = PACE(1) |
+                RCV_BUFSIZ(rcv_win >> 10));
+        req->tcb.opt2 = (__force __be32) (PACE(1) |
                 TX_QUEUE(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
                 RX_CHANNEL(0) |
                 CCTRL_ECN(enable_ecn) |
-                RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid);
+                RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid));
         if (enable_tcp_timestamps)
-                req->tcb.opt2 |= TSTAMPS_EN(1);
+                req->tcb.opt2 |= (__force __be32) TSTAMPS_EN(1);
         if (enable_tcp_sack)
-                req->tcb.opt2 |= SACK_EN(1);
+                req->tcb.opt2 |= (__force __be32) SACK_EN(1);
         if (wscale && enable_tcp_window_scaling)
-                req->tcb.opt2 |= WND_SCALE_EN(1);
-        req->tcb.opt0 = cpu_to_be64(req->tcb.opt0);
-        req->tcb.opt2 = cpu_to_be32(req->tcb.opt2);
+                req->tcb.opt2 |= (__force __be32) WND_SCALE_EN(1);
+        req->tcb.opt0 = cpu_to_be64((__force u64) req->tcb.opt0);
+        req->tcb.opt2 = cpu_to_be32((__force u32) req->tcb.opt2);
         set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
         set_bit(ACT_OFLD_CONN, &ep->com.history);
         c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
@@ -2773,7 +2773,8 @@ static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
         struct c4iw_ep *ep;
         int atid = be32_to_cpu(req->tid);
 
-        ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids, req->tid);
+        ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
+                                           (__force u32) req->tid);
         if (!ep)
                 return;
 
@@ -2817,7 +2818,7 @@ static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
         struct cpl_pass_accept_req *cpl;
         int ret;
 
-        rpl_skb = (struct sk_buff *)cpu_to_be64(req->cookie);
+        rpl_skb = (__force struct sk_buff *)cpu_to_be64(req->cookie);
         BUG_ON(!rpl_skb);
         if (req->retval) {
                 PDBG("%s passive open failure %d\n", __func__, req->retval);
@@ -2828,7 +2829,8 @@ static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
         } else {
                 cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
                 OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
-                                                      htonl(req->tid)));
+                                        (__force u32) htonl(
+                                        (__force u32) req->tid)));
                 ret = pass_accept_req(dev, rpl_skb);
                 if (!ret)
                         kfree_skb(rpl_skb);
@@ -2874,10 +2876,10 @@ static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
         struct tcp_options_received tmp_opt;
 
         /* Store values from cpl_rx_pkt in temporary location. */
-        vlantag = cpl->vlan;
-        len = cpl->len;
-        l2info  = cpl->l2info;
-        hdr_len = cpl->hdr_len;
+        vlantag = (__force u16) cpl->vlan;
+        len = (__force u16) cpl->len;
+        l2info  = (__force u32) cpl->l2info;
+        hdr_len = (__force u16) cpl->hdr_len;
         intf = cpl->iff;
 
         __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
@@ -2888,19 +2890,24 @@ static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
          */
         memset(&tmp_opt, 0, sizeof(tmp_opt));
         tcp_clear_options(&tmp_opt);
-        tcp_parse_options(skb, &tmp_opt, 0, 0, NULL);
+        tcp_parse_options(skb, &tmp_opt, NULL, 0, NULL);
 
         req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
         memset(req, 0, sizeof(*req));
         req->l2info = cpu_to_be16(V_SYN_INTF(intf) |
-                         V_SYN_MAC_IDX(G_RX_MACIDX(htonl(l2info))) |
+                         V_SYN_MAC_IDX(G_RX_MACIDX(
+                         (__force int) htonl(l2info))) |
                          F_SYN_XACT_MATCH);
-        req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(htonl(l2info))) |
-                                V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(htons(hdr_len))) |
-                                V_IP_HDR_LEN(G_RX_IPHDR_LEN(htons(hdr_len))) |
-                                V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(htonl(l2info))));
-        req->vlan = vlantag;
-        req->len = len;
+        req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(
+                                        (__force int) htonl(l2info))) |
+                                   V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(
+                                        (__force int) htons(hdr_len))) |
+                                   V_IP_HDR_LEN(G_RX_IPHDR_LEN(
+                                        (__force int) htons(hdr_len))) |
+                                   V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(
+                                        (__force int) htonl(l2info))));
+        req->vlan = (__force __be16) vlantag;
+        req->len = (__force __be16) len;
         req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) |
                                     PASS_OPEN_TOS(tos));
         req->tcpopt.mss = htons(tmp_opt.mss_clamp);
@@ -2929,7 +2936,7 @@ static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
         req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1));
         req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16)));
         req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL);
-        req->le.filter = filter;
+        req->le.filter = (__force __be32) filter;
         req->le.lport = lport;
         req->le.pport = rport;
         req->le.u.ipv4.lip = laddr;
@@ -2955,7 +2962,7 @@ static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
          * TP will ignore any value > 0 for MSS index.
          */
         req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF));
-        req->cookie = cpu_to_be64((u64)skb);
+        req->cookie = (__force __u64) cpu_to_be64((u64)skb);
 
         set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
         cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
@@ -3005,7 +3012,8 @@ static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
         /*
          * Calculate the server tid from filter hit index from cpl_rx_pkt.
          */
-        stid = cpu_to_be32(rss->hash_val) - dev->rdev.lldi.tids->sftid_base
+        stid = (__force int) cpu_to_be32((__force u32) rss->hash_val)
+                                          - dev->rdev.lldi.tids->sftid_base
                                           + dev->rdev.lldi.tids->nstids;
 
         lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
@@ -3066,10 +3074,10 @@ static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
 
         step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
         rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
-        window = htons(tcph->window);
+        window = (__force u16) htons((__force u16)tcph->window);
 
         /* Calcuate filter portion for LE region. */
-        filter = cpu_to_be32(select_ntuple(dev, dst, e));
+        filter = (__force unsigned int) cpu_to_be32(select_ntuple(dev, dst, e));
 
         /*
          * Synthesize the cpl_pass_accept_req. We have everything except the
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index ba11c76c0b5a..dc6adb213cd6 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -797,7 +797,8 @@ static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
                        "RSS %#llx, FL %#llx, len %u\n",
                        pci_name(ctx->lldi.pdev), gl->va,
                        (unsigned long long)be64_to_cpu(*rsp),
-                       (unsigned long long)be64_to_cpu(*(u64 *)gl->va),
+                       (unsigned long long)be64_to_cpu(
+                       *(__force __be64 *)gl->va),
                        gl->tot_len);
 
                 return 0;