Unverified Commit 0b15078d authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!9045 ALSA: seq: Fix race of snd_seq_timer_open() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Zheng Zucheng <zhengzucheng@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/WTXW5IBUUXPQPVFWASTV6JN6IGJX4UIB/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9R4II 
 
Link:https://gitee.com/openeuler/kernel/pulls/9045

 

Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents 24a77059 b9f80b7f

sound/core/seq/seq_timer.c

+8 −1
Original line number Diff line number Diff line
@@ -308,8 +308,15 @@ int snd_seq_timer_open(struct snd_seq_queue *q) 
	t->callback_data = q;

	t->flags |= SNDRV_TIMER_IFLG_AUTO;

	spin_lock_irq(&tmr->lock);

	if (tmr->timeri)

		err = -EBUSY;

	else

		tmr->timeri = t;

	spin_unlock_irq(&tmr->lock);

	if (err < 0) {

		snd_timer_close(t);

		return err;

	}

	return 0;

}