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

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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: Prudhvi Yarlagadda <pyarlaga@codeaurora.org>
This commit is contained in:
Prudhvi Yarlagadda 2019-11-14 12:02:42 +05:30 • committed by Gerrit - the friendly Code Review server
commit f138490407
1 changed files with 4 additions and 0 deletions
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4
drivers/slimbus/slim-msm-ngd.c
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@ -166,6 +166,8 @@ 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;
}