On Mon, Sep 18, 2017 at 04:14:53PM -0700, Christoph Hellwig wrote:
> +static void nvme_failover_req(struct request *req)
> +{
> + struct nvme_ns *ns = req->q->queuedata;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&ns->head->requeue_lock, flags);
> + blk_steal_bios(&ns->head->requeue_list, req);
> + spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
> +
> + nvme_reset_ctrl(ns->ctrl);
> + kblockd_schedule_work(&ns->head->requeue_work);
> +}
Need to call blk_mq_free_req after stealing all its bios to prevent
leaking that entered request.
All together, I needed just two small changes to the entire series to
get everything testing successfully. Here's the diff on top of your set:
---
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 5449c83..55620ba 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -115,6 +115,8 @@ static void nvme_failover_req(struct request *req)
blk_steal_bios(&ns->head->requeue_list, req);
spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
+ blk_mq_free_request(req);
+
nvme_reset_ctrl(ns->ctrl);
kblockd_schedule_work(&ns->head->requeue_work);
}
@@ -1935,6 +1937,9 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl,
struct nvme_id_ctrl *id)
{
struct nvme_subsystem *subsys, *found;
+ if (ctrl->identified)
+ return 0;
+
subsys = kzalloc(sizeof(*subsys), GFP_KERNEL);
if (!subsys)
return -ENOMEM;
--
