RDMA/cxgb4: Add timeouts when waiting for FW responses

Don't hang a host thread if the FW stops responding.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 3eff5df6d40f94ec50c4339a27224e9c06319d62..6c40779b62f4c60a93aa507ae62b70fc30eeef5e 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -2050,8 +2050,15 @@ int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
                goto fail3;
 
        /* wait for pass_open_rpl */
-       wait_event(ep->com.waitq, ep->com.rpl_done);
-       err = ep->com.rpl_err;
+       wait_event_timeout(ep->com.waitq, ep->com.rpl_done, C4IW_WR_TO);
+       if (ep->com.rpl_done)
+               err = ep->com.rpl_err;
+       else {
+               printk(KERN_ERR MOD "Device %s not responding!\n",
+                      pci_name(ep->com.dev->rdev.lldi.pdev));
+               ep->com.dev->rdev.flags = T4_FATAL_ERROR;
+               err = -EIO;
+       }
        if (!err) {
                cm_id->provider_data = ep;
                goto out;
@@ -2080,10 +2087,17 @@ int c4iw_destroy_listen(struct iw_cm_id *cm_id)
        err = listen_stop(ep);
        if (err)
                goto done;
-       wait_event(ep->com.waitq, ep->com.rpl_done);
+       wait_event_timeout(ep->com.waitq, ep->com.rpl_done, C4IW_WR_TO);
+       if (ep->com.rpl_done)
+               err = ep->com.rpl_err;
+       else {
+               printk(KERN_ERR MOD "Device %s not responding!\n",
+                      pci_name(ep->com.dev->rdev.lldi.pdev));
+               ep->com.dev->rdev.flags = T4_FATAL_ERROR;
+               err = -EIO;
+       }
        cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET);
 done:
-       err = ep->com.rpl_err;
        cm_id->rem_ref(cm_id);
        c4iw_put_ep(&ep->com);
        return err;