Unverified Commit 6fb74cb6 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!3849 pipe: Fix endless sleep problem due to the out-of-order 

Merge Pull Request from: @ci-robot 
 
PR sync from: Baokun Li <libaokun1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CEQ3LPIY62GHIQPUZXOJF3YPF6EYTOS7/ 
 
https://gitee.com/openeuler/kernel/issues/I8U3TT 
 
Link:https://gitee.com/openeuler/kernel/pulls/3849

 

Reviewed-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parents 8a9ec5bf ccd366f0

fs/pipe.c

+2 −0
Original line number Diff line number Diff line
@@ -672,8 +672,10 @@ pipe_poll(struct file *filp, poll_table *wait) 
	 * if something changes and you got it wrong, the poll

	 * table entry will wake you up and fix it.

	 */

	spin_lock_irq(&pipe->rd_wait.lock);

	head = READ_ONCE(pipe->head);

	tail = READ_ONCE(pipe->tail);

	spin_unlock_irq(&pipe->rd_wait.lock);



	mask = 0;

	if (filp->f_mode & FMODE_READ) {