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Commit ffc622c6 authored by Prudhvi Yarlagadda's avatar Prudhvi Yarlagadda
Browse files

slim-msm-ngd: Add wake lock to avoid race with suspend and SSR 



Add wake lock in SSR up notification handling to avoid race
condition between system suspend and SSR up handling sequence
which can result in un-clocked access.

Change-Id: I246fa70df53b0cb7acdfcadf9cfe2ce01a3bff6b
Signed-off-by: default avatarPrudhvi Yarlagadda <pyarlaga@codeaurora.org>
parent 090c2c57

drivers/slimbus/slim-msm-ngd.c

+4 −0
Original line number Diff line number Diff line
@@ -167,6 +167,8 @@ static int ngd_slim_qmi_new_server(struct qmi_handle *hdl, 
		container_of(qmi, struct msm_slim_ctrl, qmi);



	SLIM_INFO(dev, "Slimbus QMI new server event received\n");

	/* Hold wake lock until notify slaves thread is done */

	pm_stay_awake(dev->dev);

	qmi->svc_info.sq_family = AF_QIPCRTR;

	qmi->svc_info.sq_node = service->node;

	qmi->svc_info.sq_port = service->port;
@@ -1622,6 +1624,7 @@ static int ngd_notify_slaves(void *data) 
	ret = ngd_slim_qmi_svc_event_init(&dev->qmi);

	if (ret) {

		pr_err("Slimbus QMI service registration failed:%d\n", ret);

		pm_relax(dev->dev);

		return ret;

	}
@@ -1662,6 +1665,7 @@ static int ngd_notify_slaves(void *data) 
		}

		mutex_unlock(&ctrl->m_ctrl);

	}

	pm_relax(dev->dev);

	return 0;

}