Unverified Commit 0d8a1480 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
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!1299 [sync] PR-1270: media: dvb-core: Fix kernel WARNING for blocking operation in wait_event*() 

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/1270 
 
PR sync from: Chen Jiahao <chenjiahao16@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/LKM3OGRPHUFIBAXN26GKXPU4STERGPYH/ 
 
 
Link:https://gitee.com/openeuler/kernel/pulls/1299

 

Reviewed-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 3da03a09 dcfd0d01

drivers/media/dvb-core/dvb_frontend.c

+12 −4
Original line number Diff line number Diff line
@@ -292,14 +292,22 @@ static int dvb_frontend_get_event(struct dvb_frontend *fe, 
	}



	if (events->eventw == events->eventr) {

		int ret;

		struct wait_queue_entry wait;

		int ret = 0;



		if (flags & O_NONBLOCK)

			return -EWOULDBLOCK;



		ret = wait_event_interruptible(events->wait_queue,

					       dvb_frontend_test_event(fepriv, events));



		init_waitqueue_entry(&wait, current);

		add_wait_queue(&events->wait_queue, &wait);

		while (!dvb_frontend_test_event(fepriv, events)) {

			wait_woken(&wait, TASK_INTERRUPTIBLE, 0);

			if (signal_pending(current)) {

				ret = -ERESTARTSYS;

				break;

			}

		}

		remove_wait_queue(&events->wait_queue, &wait);

		if (ret < 0)

			return ret;

	}