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authorChristoph Hellwig <hch@lst.de>2021-03-03 13:51:47 +0100
committerChristoph Hellwig <hch@lst.de>2021-03-18 05:38:48 +0100
commit985c5a329dfe5ecb782551cddef48912961b83f1 (patch)
tree4eb45cb47126dedbb3c4c20d8fcaf651b03aac16 /drivers
parent06c3c3365b4bae5ef0f0525d3683b73cbae1e69c (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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nvme/host/core.c4
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;
}