libcxgbi:cxgb4i Guard ipv6 code with a config check

Fixes: fc8d0590d914 ("libcxgbi: Add ipv6 api to driver")
Fixes: 759a0cc5a3e1 ("cxgb4i: Add ipv6 code to driver, call into libcxgbi ipv6
api")
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 19 insertions, 3 deletions

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 1041574edcfc..a4a4e98effdd 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -1289,8 +1289,14 @@ static int init_act_open(struct cxgbi_sock *csk)
 
         if (csk->csk_family == AF_INET)
                 daddr = &csk->daddr.sin_addr.s_addr;
-        else
+#if IS_ENABLED(CONFIG_IPV6)
+        else if (csk->csk_family == AF_INET6)
                 daddr = &csk->daddr6.sin6_addr;
+#endif
+        else {
+                pr_err("address family 0x%x not supported\n", csk->csk_family);
+                goto rel_resource;
+        }
 
         n = dst_neigh_lookup(csk->dst, daddr);
 
@@ -1631,6 +1637,7 @@ static int cxgb4i_ddp_init(struct cxgbi_device *cdev)
         return 0;
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
 static int cxgbi_inet6addr_handler(struct notifier_block *this,
                                    unsigned long event, void *data)
 {
@@ -1755,6 +1762,7 @@ static void cxgbi_update_clip(struct cxgbi_device *cdev)
         }
         rcu_read_unlock();
 }
+#endif /* IS_ENABLED(CONFIG_IPV6) */
 
 static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
 {
@@ -1874,7 +1882,9 @@ static int t4_uld_state_change(void *handle, enum cxgb4_state state)
         switch (state) {
         case CXGB4_STATE_UP:
                 pr_info("cdev 0x%p, UP.\n", cdev);
+#if IS_ENABLED(CONFIG_IPV6)
                 cxgbi_update_clip(cdev);
+#endif
                 /* re-initialize */
                 break;
         case CXGB4_STATE_START_RECOVERY:
@@ -1906,15 +1916,17 @@ static int __init cxgb4i_init_module(void)
                 return rc;
         cxgb4_register_uld(CXGB4_ULD_ISCSI, &cxgb4i_uld_info);
 
+#if IS_ENABLED(CONFIG_IPV6)
         register_inet6addr_notifier(&cxgbi_inet6addr_notifier);
-
+#endif
         return 0;
 }
 
 static void __exit cxgb4i_exit_module(void)
 {
+#if IS_ENABLED(CONFIG_IPV6)
         unregister_inet6addr_notifier(&cxgbi_inet6addr_notifier);
-
+#endif
         cxgb4_unregister_uld(CXGB4_ULD_ISCSI);
         cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T4);
         cxgbi_iscsi_cleanup(&cxgb4i_iscsi_transport, &cxgb4i_stt);
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index d2fe507fc695..3d5322d59f15 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -602,6 +602,7 @@ err_out:
         return ERR_PTR(err);
 }
 
+#if IS_ENABLED(CONFIG_IPV6)
 static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr,
                                         const struct in6_addr *daddr)
 {
@@ -716,6 +717,7 @@ rel_rt:
 err_out:
         return ERR_PTR(err);
 }
+#endif /* IS_ENABLED(CONFIG_IPV6) */
 
 void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn,
                         unsigned int opt)
@@ -2638,8 +2640,10 @@ struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost,
 
         if (dst_addr->sa_family == AF_INET) {
                 csk = cxgbi_check_route(dst_addr);
+#if IS_ENABLED(CONFIG_IPV6)
         } else if (dst_addr->sa_family == AF_INET6) {
                 csk = cxgbi_check_route6(dst_addr);
+#endif
         } else {
                 pr_info("address family 0x%x NOT supported.\n",
                         dst_addr->sa_family);