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Commit 26f20c8e authored by Arun Kumar Neelakantam's avatar Arun Kumar Neelakantam Committed by Chris Lew
Browse files

net: qrtr: Add pm_wakeup_event() support 



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

Add pm_wakeup_ws_event with hard flag to abort the suspend when a
packet is received.

CRs-Fixed: 2432846
Change-Id: I5cec4f9273362e8e2c1df1dae159a6bb5e54d16d
Signed-off-by: default avatarArun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent 4a6eb4b3

net/qrtr/qrtr.c

+14 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/rwsem.h>

#include <linux/ipc_logging.h>

#include <linux/uidgid.h>

#include <linux/pm_wakeup.h>



#include <net/sock.h>

#include <uapi/linux/sched/types.h>
@@ -150,6 +151,7 @@ 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

 * @ilc: ipc logging context reference

 */

struct qrtr_node {
@@ -171,6 +173,8 @@ struct qrtr_node { 
	struct task_struct *task;

	struct kthread_work read_data;



	struct wakeup_source *ws;



	void *ilc;

};
@@ -347,6 +351,7 @@ 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);
@@ -611,10 +616,16 @@ static void qrtr_node_assign(struct qrtr_node *node, unsigned int nid) 
		node->nid = nid;

	up_write(&qrtr_node_lock);



	if (!node->ilc) {

	snprintf(name, sizeof(name), "qrtr_%d", nid);

	if (!node->ilc) {

		node->ilc = ipc_log_context_create(QRTR_LOG_PAGE_CNT, name, 0);

	}

	/* create wakeup source for only NID = 3,0 or 7.

	 * From other nodes sensor service stream samples

	 * cause APPS suspend problems and power drain issue.

	 */

	if (!node->ws && (nid == 0 || nid == 3 || nid == 7))

		node->ws = wakeup_source_register(name);

}



/**
@@ -745,6 +756,8 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len) 
	    cb->type != QRTR_TYPE_RESUME_TX)

		goto err;



	pm_wakeup_ws_event(node->ws, 0, true);



	if (frag) {

		skb->data_len = size;

		skb->len = size;