linux-kernel - [PATCH 3.16 12/83] bnx2x: Disable multi-cos feature.

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Date:   Wed, 20 Nov 2019 15:37:22 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Manish Chopra" <manishc@...vell.com>,
        "Sudarsana Reddy Kalluru" <skalluru@...vell.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.16 12/83] bnx2x: Disable multi-cos feature.

3.16.78-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Sudarsana Reddy Kalluru <skalluru@...vell.com>

commit d1f0b5dce8fda09a7f5f04c1878f181d548e42f5 upstream.

Commit 3968d38917eb ("bnx2x: Fix Multi-Cos.") which enabled multi-cos
feature after prolonged time in driver added some regression causing
numerous issues (sudden reboots, tx timeout etc.) reported by customers.
We plan to backout this commit and submit proper fix once we have root
cause of issues reported with this feature enabled.

Fixes: 3968d38917eb ("bnx2x: Fix Multi-Cos.")
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@...vell.com>
Signed-off-by: Manish Chopra <manishc@...vell.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -1914,7 +1914,7 @@ u16 bnx2x_select_queue(struct net_device
 	}
 
 	/* select a non-FCoE queue */
-	return fallback(dev, skb) % (BNX2X_NUM_ETH_QUEUES(bp) * bp->max_cos);
+	return fallback(dev, skb) % (BNX2X_NUM_ETH_QUEUES(bp));
 }
 
 void bnx2x_set_num_queues(struct bnx2x *bp)