6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ming Lei ming.lei@redhat.com
[ Upstream commit e63a57303599b17290cd8bc48e6f20b24289a8bc ]
blkcg_deactivate_policy() can be called after blkg_destroy_all() returns, and it isn't necessary since blkg_destroy_all has covered policy deactivation.
Signed-off-by: Ming Lei ming.lei@redhat.com Link: https://lore.kernel.org/r/20231117023527.3188627-4-ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-cgroup.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 4a42ea2972ad8..4b48c2c440981 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -577,6 +577,7 @@ static void blkg_destroy_all(struct gendisk *disk) struct request_queue *q = disk->queue; struct blkcg_gq *blkg, *n; int count = BLKG_DESTROY_BATCH_SIZE; + int i;
restart: spin_lock_irq(&q->queue_lock); @@ -602,6 +603,18 @@ static void blkg_destroy_all(struct gendisk *disk) } }
+ /* + * Mark policy deactivated since policy offline has been done, and + * the free is scheduled, so future blkcg_deactivate_policy() can + * be bypassed + */ + for (i = 0; i < BLKCG_MAX_POLS; i++) { + struct blkcg_policy *pol = blkcg_policy[i]; + + if (pol) + __clear_bit(pol->plid, q->blkcg_pols); + } + q->root_blkg = NULL; spin_unlock_irq(&q->queue_lock); }