[PATCH] nvme: fix error-handling for io_uring nvme-passthrough

[Kanchan Joshi]

From: Anuj Gupta <anuj20.g at samsung.com>

Driver may return an error before submitting the command to the device.
Ensure that such error is propagated up.

Fixes: 456cba386e94 ("nvme: wire-up uring-cmd support for io-passthru on char-device.")

Signed-off-by: Anuj Gupta <anuj20.g at samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k at samsung.com>
---
 drivers/nvme/host/ioctl.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index d8ff796fd5f2..53987df6ea7c 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -508,8 +508,11 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req,
 	req->bio = pdu->bio;
 	if (nvme_req(req)->flags & NVME_REQ_CANCELLED)
 		pdu->nvme_status = -EINTR;
-	else
+	else {
 		pdu->nvme_status = nvme_req(req)->status;
+		if (!pdu->nvme_status)
+			pdu->nvme_status = blk_status_to_errno(err);
+	}
 	pdu->u.result = le64_to_cpu(nvme_req(req)->result.u64);
 
 	/*
-- 
2.25.1