From 2005b348b4694a60f3205aee8bacbdad21600410 Mon Sep 17 00:00:00 2001
From: Subbaraya Sundeep <sbhatta@marvell.com>
Date: Fri, 21 Jan 2022 12:04:46 +0530
Subject: [PATCH 26/34] octeontx2-pf: Forward error codes to VF
Git-commit: a8db854be28622a2477cb21cdf7f829adbb2c42d
References: git-fixes
Patch-mainline: v5.17-rc2
PF forwards its VF messages to AF and corresponding
replies from AF to VF. AF sets proper error code in the
replies after processing message requests. Currently PF
checks the error codes in replies and sends invalid
message to VF. This way VF lacks the information of
error code set by AF for its messages. This patch
changes that such that PF simply forwards AF replies
so that VF can handle error codes.
Fixes: d424b6c02415 ("octeontx2-pf: Enable SRIOV and added VF mbox handling")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 105b32221d91..f6fbb792b5e2 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -389,7 +389,12 @@ static int otx2_forward_vf_mbox_msgs(struct otx2_nic *pf,
dst_mdev->msg_size = mbox_hdr->msg_size;
dst_mdev->num_msgs = num_msgs;
err = otx2_sync_mbox_msg(dst_mbox);
- if (err) {
+ /* Error code -EIO indicate there is a communication failure
+ * to the AF. Rest of the error codes indicate that AF processed
+ * VF messages and set the error codes in response messages
+ * (if any) so simply forward responses to VF.
+ */
+ if (err == -EIO) {
dev_warn(pf->dev,
"AF not responding to VF%d messages\n", vf);
/* restore PF mbase and exit */
--
2.16.4