From 6df3dbc83fb8043a5975d75970d296d6d14f7273 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Thu, 26 Mar 2015 13:49:33 -0600 Subject: [PATCH] NVMe: Freeze admin queue on device failure This fixes a race accessing an invalid address when a controller's admin queue is in use during a reset for failure or hot removal occurs. The admin queue will be frozen to prevent new users from entering prior to the doorbell queue being unmapped. Signed-off-by: Keith Busch Signed-off-by: Jens Axboe --- drivers/block/nvme-core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index ceb32dd52a6c..ee83554c28ba 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1347,6 +1347,9 @@ static int nvme_suspend_queue(struct nvme_queue *nvmeq) nvmeq->cq_vector = -1; spin_unlock_irq(&nvmeq->q_lock); + if (!nvmeq->qid && nvmeq->dev->admin_q) + blk_mq_freeze_queue_start(nvmeq->dev->admin_q); + irq_set_affinity_hint(vector, NULL); free_irq(vector, nvmeq); @@ -1378,8 +1381,6 @@ static void nvme_disable_queue(struct nvme_dev *dev, int qid) adapter_delete_sq(dev, qid); adapter_delete_cq(dev, qid); } - if (!qid && dev->admin_q) - blk_mq_freeze_queue_start(dev->admin_q); spin_lock_irq(&nvmeq->q_lock); nvme_process_cq(nvmeq); -- 2.20.1