[PATCH 05/25] nvme: make nvme_error_status private

[Christoph Hellwig]

Currently it's used by the lighnvm passthrough ioctl, but we'd like to make
it private in preparation of block layer specific error code.  Lighnvm already
returns the real NVMe status anyway, so I think we can just limit it to
returning -EIO for any status set.

This will need a careful audit from the lightnvm folks, though.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 drivers/nvme/host/core.c     | 3 +--
 drivers/nvme/host/lightnvm.c | 8 ++++----
 drivers/nvme/host/nvme.h     | 1 -
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index b73a86a78379..fbc7d64b6f10 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -66,7 +66,7 @@ static DEFINE_SPINLOCK(dev_list_lock);
 
 static struct class *nvme_class;
 
-int nvme_error_status(struct request *req)
+static int nvme_error_status(struct request *req)
 {
 	switch (nvme_req(req)->status & 0x7ff) {
 	case NVME_SC_SUCCESS:
@@ -77,7 +77,6 @@ int nvme_error_status(struct request *req)
 		return -EIO;
 	}
 }
-EXPORT_SYMBOL_GPL(nvme_error_status);
 
 static inline bool nvme_req_needs_retry(struct request *req)
 {
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 3d7b92c4c577..69067833b242 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -484,7 +484,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
 	struct nvm_rq *rqd = rq->end_io_data;
 
 	rqd->ppa_status = nvme_req(rq)->result.u64;
-	rqd->error = nvme_req(req)->status;
+	rqd->error = nvme_req(rq)->status;
 	nvm_end_io(rqd);
 
 	kfree(nvme_req(rq)->cmd);
@@ -611,7 +611,7 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 	__le64 *metadata = NULL;
 	dma_addr_t metadata_dma;
 	DECLARE_COMPLETION_ONSTACK(wait);
-	int ret;
+	int ret = 0;
 
 	rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0,
 			NVME_QID_ANY);
@@ -683,8 +683,8 @@ static int nvme_nvm_submit_user_cmd(struct request_queue *q,
 
 	if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
 		ret = -EINTR;
-	else
-		ret = nvme_error_status(rq);
+	else if (nvme_req(rq)->status & 0x7ff)
+		ret = -EIO;
 	if (result)
 		*result = nvme_req(rq)->status & 0x7ff;
 	if (status)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 7a03a0897e0b..4dc930d3545d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -254,7 +254,6 @@ static inline void nvme_end_request(struct request *req, __le16 status,
 	blk_mq_complete_request(req, 0);
 }
 
-int nvme_error_status(struct request *req);
 void nvme_complete_rq(struct request *req);
 void nvme_cancel_request(struct request *req, void *data, bool reserved);
 bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
-- 
2.11.0