[PATCH 2/6] nvme-core: introduce complete failed request

[Chao Leng]

When a request is queued failed, if the fail status is not
BLK_STS_RESOURCE, BLK_STS_DEV_RESOURCE, BLK_STS_ZONE_RESOURCE,
the request is need to complete with nvme_complete_rq in queue_rq.
So introduce nvme_try_complete_failed_req.
The request is needed to complete with NVME_SC_HOST_PATH_ERROR in
nvmf_fail_nonready_command and queue_rq.
So introduce nvme_complete_failed_req.
For details, see the subsequent patches.

Signed-off-by: Chao Leng <lengchao at huawei.com>
---
 drivers/nvme/host/nvme.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index bfcedfa4b057..1a0bddb9158f 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -649,6 +649,24 @@ void nvme_put_ns_from_disk(struct nvme_ns_head *head, int idx);
 extern const struct attribute_group *nvme_ns_id_attr_groups[];
 extern const struct block_device_operations nvme_ns_head_ops;
 
+static inline void nvme_complete_failed_req(struct request *req)
+{
+	nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
+	blk_mq_set_request_complete(req);
+	nvme_complete_rq(req);
+}
+
+static inline blk_status_t nvme_try_complete_failed_req(struct request *req,
+							blk_status_t ret)
+{
+	if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE ||
+	    ret == BLK_STS_ZONE_RESOURCE)
+		return ret;
+
+	nvme_complete_failed_req(req);
+	return BLK_STS_OK;
+}
+
 #ifdef CONFIG_NVME_MULTIPATH
 static inline bool nvme_ctrl_use_ana(struct nvme_ctrl *ctrl)
 {
-- 
2.16.4