Unverified Commit 3cf52f86 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
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!14915 net/smc: protect link down work from execute after lgr freed 

Merge Pull Request from: @ci-robot 
 
PR sync from: Wang Liang <wangliang74@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/TVH6U37DCN7LFG76GOANWTJUSLFFJ67T/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBEG41 
 
Link:https://gitee.com/openeuler/kernel/pulls/14915

 

Reviewed-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents eb35bd41 0f6bae01

net/smc/smc_core.c

+7 −2
Original line number Diff line number Diff line
@@ -1773,7 +1773,9 @@ void smcr_link_down_cond_sched(struct smc_link *lnk) 
{

	if (smc_link_downing(&lnk->state)) {

		trace_smcr_link_down(lnk, __builtin_return_address(0));

		schedule_work(&lnk->link_down_wrk);

		smcr_link_hold(lnk); /* smcr_link_put in link_down_wrk */

		if (!schedule_work(&lnk->link_down_wrk))

			smcr_link_put(lnk);

	}

}
@@ -1805,11 +1807,14 @@ static void smc_link_down_work(struct work_struct *work) 
	struct smc_link_group *lgr = link->lgr;



	if (list_empty(&lgr->list))

		return;

		goto out;

	wake_up_all(&lgr->llc_msg_waiter);

	down_write(&lgr->llc_conf_mutex);

	smcr_link_down(link);

	up_write(&lgr->llc_conf_mutex);



out:

	smcr_link_put(link); /* smcr_link_hold by schedulers of link_down_work */

}



static int smc_vlan_by_tcpsk_walk(struct net_device *lower_dev,