linux-kernel - [PATCH] qla2xxx: Set NVME status code for failed NVME FCP request

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Date:   Thu,  4 Jun 2020 12:07:45 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     linux-scsi@...r.kernel.org
Cc:     Nilesh Javali <njavali@...vell.com>,
        GR-QLogic-Storage-Upstream@...vell.com,
        linux-kernel@...r.kernel.org, Daniel Wagner <dwagner@...e.de>
Subject: [PATCH] qla2xxx: Set NVME status code for failed NVME FCP request

The qla2xxx driver knows when request was processed successfully or
not. But it always sets the NVME status code to 0/NVME_SC_SUCCESS. The
upper layer needs to figure out from the rcv_rsplen and
transferred_length variables if the request was successfully. This is
not always possible, e.g. when the request data length is 0, the
transferred_length is also set 0 which is interpreted as success in
nvme_fc_fcpio_done(). Let's inform the upper
layer (nvme_fc_fcpio_done()) when something went wrong.

nvme_fc_fcpio_done() maps all non NVME_SC_SUCCESS status codes to
NVME_SC_HOST_PATH_ERROR. There isn't any benefit to map the QLA status
code to the NVME status code. Therefore, let's use NVME_SC_INTERNAL to
indicate an error which aligns it with the lpfc driver.

Signed-off-by: Daniel Wagner <dwagner@...e.de>
---
 drivers/scsi/qla2xxx/qla_nvme.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index d66d47a0f958..fa695a4007f8 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -139,11 +139,12 @@ static void qla_nvme_release_fcp_cmd_kref(struct kref *kref)
 	sp->priv = NULL;
 	if (priv->comp_status == QLA_SUCCESS) {
 		fd->rcv_rsplen = le16_to_cpu(nvme->u.nvme.rsp_pyld_len);
+		fd->status = NVME_SC_SUCCESS;
 	} else {
 		fd->rcv_rsplen = 0;
 		fd->transferred_length = 0;
+		fd->status = NVME_SC_INTERNAL;
 	}
-	fd->status = 0;
 	spin_unlock_irqrestore(&priv->cmd_lock, flags);

 	fd->done(fd);
-- 
2.16.4