nvmet: fix a wrong error status returned in error log page

When the command data_len cannot hold all the controller errors,
we should simply return as much errors as we can fit
instead of failing the command.
Signed-off-by: NAmit Engel <amit.engel@dell.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NSagi Grimberg <sagi@grimberg.me>

drivers/nvme/target/admin-cmd.c

@@ -37,7 +37,6 @@ static void nvmet_execute_get_log_page_noop(struct nvmet_req *req)
 static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
-	u16 status = NVME_SC_SUCCESS;
 	unsigned long flags;
 	off_t offset = 0;
 	u64 slot;
@@ -47,9 +46,8 @@ static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
 	slot = ctrl->err_counter % NVMET_ERROR_LOG_SLOTS;
 
 	for (i = 0; i < NVMET_ERROR_LOG_SLOTS; i++) {
-		status = nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
-				sizeof(struct nvme_error_slot));
-		if (status)
+		if (nvmet_copy_to_sgl(req, offset, &ctrl->slots[slot],
+				sizeof(struct nvme_error_slot)))
 			break;
 
 		if (slot == 0)
@@ -59,7 +57,7 @@ static void nvmet_execute_get_log_page_error(struct nvmet_req *req)
 		offset += sizeof(struct nvme_error_slot);
 	}
 	spin_unlock_irqrestore(&ctrl->error_lock, flags);
-	nvmet_req_complete(req, status);
+	nvmet_req_complete(req, 0);
 }
 
 static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req,