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Commit a5f4a078 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
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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: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent ca5a2202

drivers/infiniband/hw/cxgb4/cm.c

+18 −4
Original line number Diff line number Diff line
@@ -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);

	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;