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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Pieter Jansen van Vuuren 
        <pieter.jansenvanvuuren@netronome.com>,
        Simon Horman <simon.horman@netronome.com>,
        Jakub Kicinski <jakub.kicinski@netronome.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <alexander.levin@verizon.com>
Subject: [PATCH 4.14 110/159] nfp: fix port stats for mac representors
Date:   Fri, 23 Feb 2018 19:26:58 +0100
Message-Id: <20180223170756.686403723@linuxfoundation.org>
In-Reply-To: <20180223170743.086611315@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>


[ Upstream commit 42d779ffc186f6dd26271fc60a7417cb51aca93e ]

Previously we swapped the tx_packets, tx_bytes and tx_dropped counters
with rx_packets, rx_bytes and rx_dropped counters, respectively. This
behaviour is correct and expected for VF representors but it should not
be swapped for physical port mac representors.

Fixes: eadfa4c3be99 ("nfp: add stats and xmit helpers for representors")
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.c |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -84,16 +84,13 @@ nfp_repr_phy_port_get_stats64(struct nfp
 {
 	u8 __iomem *mem = port->eth_stats;
 
-	/* TX and RX stats are flipped as we are returning the stats as seen
-	 * at the switch port corresponding to the phys port.
-	 */
-	stats->tx_packets = readq(mem + NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK);
-	stats->tx_bytes = readq(mem + NFP_MAC_STATS_RX_IN_OCTETS);
-	stats->tx_dropped = readq(mem + NFP_MAC_STATS_RX_IN_ERRORS);
+	stats->tx_packets = readq(mem + NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK);
+	stats->tx_bytes = readq(mem + NFP_MAC_STATS_TX_OUT_OCTETS);
+	stats->tx_dropped = readq(mem + NFP_MAC_STATS_TX_OUT_ERRORS);
 
-	stats->rx_packets = readq(mem + NFP_MAC_STATS_TX_FRAMES_TRANSMITTED_OK);
-	stats->rx_bytes = readq(mem + NFP_MAC_STATS_TX_OUT_OCTETS);
-	stats->rx_dropped = readq(mem + NFP_MAC_STATS_TX_OUT_ERRORS);
+	stats->rx_packets = readq(mem + NFP_MAC_STATS_RX_FRAMES_RECEIVED_OK);
+	stats->rx_bytes = readq(mem + NFP_MAC_STATS_RX_IN_OCTETS);
+	stats->rx_dropped = readq(mem + NFP_MAC_STATS_RX_IN_ERRORS);
 }
 
 static void