X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=block%2Fblk-throttle.c;h=16f5766620a41043645756c51d441f4488af9edf;hb=refs%2Fheads%2Fsandbox%2Fklewandowski%2Frpi5;hp=13e4377a8b2865f527019830074e0febbd7a766e;hpb=2af9b20dbb39f6ebf9b9b6c090271594627d818e;p=platform%2Fkernel%2Flinux-rpi.git

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 13e4377..16f5766 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1320,6 +1320,7 @@ static void tg_conf_updated(struct throtl_grp *tg, bool global)
 		   tg_bps_limit(tg, READ), tg_bps_limit(tg, WRITE),
 		   tg_iops_limit(tg, READ), tg_iops_limit(tg, WRITE));
 
+	rcu_read_lock();
 	/*
 	 * Update has_rules[] flags for the updated tg's subtree.  A tg is
 	 * considered to have rules if either the tg itself or any of its
@@ -1347,6 +1348,7 @@ static void tg_conf_updated(struct throtl_grp *tg, bool global)
 		this_tg->latency_target = max(this_tg->latency_target,
 				parent_tg->latency_target);
 	}
+	rcu_read_unlock();
 
 	/*
 	 * We're already holding queue_lock and know @tg is valid.  Let's