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nvme: enable retries for authentication commands
Authentication commands might trigger a lengthy computation on the controller or even a callout to an external entity. In these cases the controller might return a status without the DNR bit set, indicating that the command should be retried. This patch enables retries for authentication commands by setting NVME_SUBMIT_RETRY for __nvme_submit_sync_cmd(). Reported-by: Martin George <marting@netapp.com> Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
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@ -58,7 +58,7 @@ static int nvme_auth_submit(struct nvme_ctrl *ctrl, int qid,
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void *data, size_t data_len, bool auth_send)
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{
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struct nvme_command cmd = {};
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nvme_submit_flags_t flags = 0;
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nvme_submit_flags_t flags = NVME_SUBMIT_RETRY;
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struct request_queue *q = ctrl->fabrics_q;
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int ret;
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@ -1070,6 +1070,8 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
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if (IS_ERR(req))
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return PTR_ERR(req);
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nvme_init_request(req, cmd);
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if (flags & NVME_SUBMIT_RETRY)
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req->cmd_flags &= ~REQ_FAILFAST_DRIVER;
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if (buffer && bufflen) {
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ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL);
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@ -849,6 +849,8 @@ enum {
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NVME_SUBMIT_NOWAIT = (__force nvme_submit_flags_t)(1 << 1),
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/* Set BLK_MQ_REQ_RESERVED when allocating request */
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NVME_SUBMIT_RESERVED = (__force nvme_submit_flags_t)(1 << 2),
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/* Retry command when NVME_SC_DNR is not set in the result */
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NVME_SUBMIT_RETRY = (__force nvme_submit_flags_t)(1 << 3),
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};
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int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
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