iw_cxgb4: Take clip reference before starting IPv6 listen

The h/w is designed in such a way that, if you do anything IPv6
related, a valid clip entry must be there. So take clip reference
before creating IPv6 listening servers, and then if we fail to
create server, release the clip entry.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index c9cffced00ca1df11683b961d0cc48f983056a07..704680471567e2b769cfa9b5e0bf35643d905d4a 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -3271,6 +3271,12 @@ static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
                                    &ep->com.mapped_local_addr;
 
+       if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) {
+               err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
+                                    (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+               if (err)
+                       return err;
+       }
        c4iw_init_wr_wait(&ep->com.wr_wait);
        err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
                                   ep->stid, &sin6->sin6_addr,
@@ -3282,13 +3288,13 @@ static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
                                          0, 0, __func__);
        else if (err > 0)
                err = net_xmit_errno(err);
-       if (err)
+       if (err) {
+               cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0],
+                                  (const u32 *)&sin6->sin6_addr.s6_addr, 1);
                pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
                       err, ep->stid,
                       sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
-       else
-               cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0],
-                              (const u32 *)&sin6->sin6_addr.s6_addr, 1);
+       }
        return err;
 }