Unverified Commit 9a2f2d13 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!9504 um: Add winch to winch_handlers before registering winch IRQ 

Merge Pull Request from: @ci-robot 
 
PR sync from: Chen Zhongjin <chenzhongjin@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/V6NJXEDKKCR24Q2S3IARCTVOJ6MOKBWS/ 
 
https://gitee.com/src-openeuler/kernel/issues/IA7YJR 
 
Link:https://gitee.com/openeuler/kernel/pulls/9504

 

Reviewed-by: default avatarXu Kuohai <xukuohai@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 0526df27 55951be8

arch/um/drivers/line.c

+8 −6
Original line number Diff line number Diff line
@@ -668,23 +668,25 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_port *port, 
		goto cleanup;

	}



	*winch = ((struct winch) { .list  	= LIST_HEAD_INIT(winch->list),

				   .fd  	= fd,

	*winch = ((struct winch) { .fd  	= fd,

				   .tty_fd 	= tty_fd,

				   .pid  	= pid,

				   .port 	= port,

				   .stack	= stack });



	spin_lock(&winch_handler_lock);

	list_add(&winch->list, &winch_handlers);

	spin_unlock(&winch_handler_lock);



	if (um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,

			   IRQF_SHARED, "winch", winch) < 0) {

		printk(KERN_ERR "register_winch_irq - failed to register "

		       "IRQ\n");

		goto out_free;

	}



		spin_lock(&winch_handler_lock);

	list_add(&winch->list, &winch_handlers);

		list_del(&winch->list);

		spin_unlock(&winch_handler_lock);

		goto out_free;

	}



	return;