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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>
This commit is contained in:
Steve Wise 2010-07-23 19:12:43 +00:00 committed by Roland Dreier
parent ca5a22028d
commit a5f4a07820
1 changed files with 18 additions and 4 deletions
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22
drivers/infiniband/hw/cxgb4/cm.c
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@ -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;