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net: qrtr: Add pm_wakeup_event() support

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In some cases system enters into suspend state before handling
incoming packets and cause delay in communication.

Add pm_wakup_event() to abort the suspend when a packet is received.

CRs-Fixed: 2432846
Change-Id: I5cec4f9273362e8e2c1df1dae159a6bb5e54d16d
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
This commit is contained in:
Arun Kumar Neelakantam 2019-04-10 20:02:54 +05:30 • committed by Chris Lew
commit a63f27a695
1 changed files with 8 additions and 0 deletions
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8
net/qrtr/qrtr.c
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@ -13,6 +13,7 @@
#include <linux/wait.h>
#include <linux/rwsem.h>
#include <linux/uidgid.h>
#include <linux/pm_wakeup.h>
#include <net/sock.h>
#include <uapi/linux/sched/types.h>
@ -140,6 +141,7 @@ static DEFINE_MUTEX(qrtr_port_lock);
* @kworker: worker thread for recv work
* @task: task to run the worker thread
* @read_data: scheduled work for recv work
* @ws: wakeupsource avoid system suspend
*/
struct qrtr_node {
struct mutex ep_lock;
@ -159,6 +161,8 @@ struct qrtr_node {
struct kthread_worker kworker;
struct task_struct *task;
struct kthread_work read_data;
struct wakeup_source *ws;
};
struct qrtr_tx_flow_waiter {
@ -258,6 +262,7 @@ static void __qrtr_node_release(struct kref *kref)
}
mutex_unlock(&node->qrtr_tx_lock);
wakeup_source_unregister(node->ws);
kthread_flush_worker(&node->kworker);
kthread_stop(node->task);
@ -685,6 +690,7 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
if (cb->type != QRTR_TYPE_DATA || cb->dst_node != qrtr_local_nid) {
skb_queue_tail(&node->rx_queue, skb);
kthread_queue_work(&node->kworker, &node->read_data);
__pm_wakeup_event(node->ws, 0);
} else {
ipc = qrtr_port_lookup(cb->dst_port);
if (!ipc)
@ -891,6 +897,8 @@ int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int net_id,
up_write(&qrtr_epts_lock);
ep->node = node;
node->ws = wakeup_source_register("qrtr_ws");
return 0;
}
EXPORT_SYMBOL_GPL(qrtr_endpoint_register);