linux-kernel - [PATCH 5.15 125/171] octeontx2-af: Increase link credit restore polling timeout

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Date:   Mon, 31 Jan 2022 11:56:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Geetha sowjanya <gakula@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        Sunil Goutham <sgoutham@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 125/171] octeontx2-af: Increase link credit restore polling timeout

From: Geetha sowjanya <gakula@...vell.com>

[ Upstream commit 1581d61b42d985cefe7b71eea67ab3bfcbf34d0f ]

It's been observed that sometimes link credit restore takes
a lot of time than the current timeout. This patch increases
the default timeout value and return the proper error value
on failure.

Fixes: 1c74b89171c3 ("octeontx2-af: Wait for TX link idle for credits change")
Signed-off-by: Geetha sowjanya <gakula@...vell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@...vell.com>
Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/marvell/octeontx2/af/mbox.h    | 1 +
 drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index a8618259de943..26ad71842b3b2 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -700,6 +700,7 @@ enum nix_af_status {
 	NIX_AF_ERR_BANDPROF_INVAL_REQ  = -428,
 	NIX_AF_ERR_CQ_CTX_WRITE_ERR  = -429,
 	NIX_AF_ERR_AQ_CTX_RETRY_WRITE  = -430,
+	NIX_AF_ERR_LINK_CREDITS  = -431,
 };
 
 /* For NIX RX vtag action  */
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 9d4cc0ae61474..959266894cf15 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -3891,8 +3891,8 @@ nix_config_link_credits(struct rvu *rvu, int blkaddr, int link,
 			    NIX_AF_TL1X_SW_XOFF(schq), BIT_ULL(0));
 	}
 
-	rc = -EBUSY;
-	poll_tmo = jiffies + usecs_to_jiffies(10000);
+	rc = NIX_AF_ERR_LINK_CREDITS;
+	poll_tmo = jiffies + usecs_to_jiffies(200000);
 	/* Wait for credits to return */
 	do {
 		if (time_after(jiffies, poll_tmo))
-- 
2.34.1