Commit 183eeb98 authored by Arend van Spriel's avatar Arend van Spriel Committed by Greg Kroah-Hartman
Browse files

staging: brcm80211: fix rtnl_lock issue when bringing down brcmfmac 



When bringing down the netdevice interface a deadlock occurred
sporadically due to the rtnl_lock being held by a task that was
waiting for another task trying to get the lock. This patch fixes
that issue.

Reviewed-by: default avatarFranky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: default avatarRoland Vossen <rvossen@broadcom.com>
Signed-off-by: default avatarArend van Spriel <arend@broadcom.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 60be7ec5

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

+7 −0
Original line number Diff line number Diff line
@@ -3189,7 +3189,14 @@ static void brcmf_term_iscan(struct brcmf_cfg80211_priv *cfg_priv) 
	if (cfg_priv->iscan_on && iscan->tsk) {

		iscan->state = WL_ISCAN_STATE_IDLE;

		send_sig(SIGTERM, iscan->tsk, 1);



		/*

		 * The iscan task may want to acquire the rtnl_lock

		 * so release it here upon stopping the task.

		 */

		rtnl_unlock();

		kthread_stop(iscan->tsk);

		rtnl_lock();

		iscan->tsk = NULL;



		/* Abort iscan running in FW */