diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-03-03 13:51:47 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-03-18 05:38:48 +0100 |
| commit | 985c5a329dfe5ecb782551cddef48912961b83f1 (patch) | |
| tree | 4eb45cb47126dedbb3c4c20d8fcaf651b03aac16 | |
| parent | 06c3c3365b4bae5ef0f0525d3683b73cbae1e69c (diff) | |
nvme: allocate the keep alive request using BLK_MQ_REQ_NOWAIT
To avoid an error recovery deadlock where the keep alive work is waiting
for a request and thus can't be flushed to make progress for tearing down
the controller. Also print the error code returned from
blk_mq_alloc_request to help debugging any future issues in this code.
Based on an earlier patch from Hannes Reinecke <hare@suse.de>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
| -rw-r--r-- | drivers/nvme/host/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 45d510a12c6b..83d6740f8d4e 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1242,10 +1242,10 @@ static void nvme_keep_alive_work(struct work_struct *work) } rq = nvme_alloc_request(ctrl->admin_q, &ctrl->ka_cmd, - BLK_MQ_REQ_RESERVED); + BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT); if (IS_ERR(rq)) { /* allocation failure, reset the controller */ - dev_err(ctrl->device, "keep-alive failed\n"); + dev_err(ctrl->device, "keep-alive failed: %ld\n", PTR_ERR(rq)); nvme_reset_ctrl(ctrl); return; } |