linux-kernel - [PATCH net 3/3] net: mvneta: eliminate wrong call to handle rx descriptor error

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Date:   Tue, 19 Dec 2017 17:59:47 +0100
From:   Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:     "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory CLEMENT <gregory.clement@...e-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Antoine Tenart <antoine.tenart@...e-electrons.com>,
        Miquèl Raynal <miquel.raynal@...e-electrons.com>,
        Nadav Haklai <nadavh@...vell.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Lior Amsalem <alior@...vell.com>,
        Dmitri Epshtein <dima@...vell.com>,
        Yelena Krivosheev <yelena@...vell.com>, stable@...r.kernel.org
Subject: [PATCH net 3/3] net: mvneta: eliminate wrong call to handle rx descriptor error

From: Yelena Krivosheev <yelena@...vell.com>

There are few reasons in mvneta_rx_swbm() function when received packet
is dropped. mvneta_rx_error() should be called only if error bit [16]
is set in rx descriptor.

[gregory.clement@...e-electrons.com: add fixes tag]
Cc: stable@...r.kernel.org
Fixes: dc35a10f68d3 ("net: mvneta: bm: add support for hardware buffer management")
Signed-off-by: Yelena Krivosheev <yelena@...vell.com>
Tested-by: Dmitri Epshtein <dima@...vell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
---
 drivers/net/ethernet/marvell/mvneta.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 1e0835655c93..a539263cd79c 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1962,9 +1962,9 @@ static int mvneta_rx_swbm(struct mvneta_port *pp, int rx_todo,
 
 		if (!mvneta_rxq_desc_is_first_last(rx_status) ||
 		    (rx_status & MVNETA_RXD_ERR_SUMMARY)) {
+			mvneta_rx_error(pp, rx_desc);
 err_drop_frame:
 			dev->stats.rx_errors++;
-			mvneta_rx_error(pp, rx_desc);
 			/* leave the descriptor untouched */
 			continue;
 		}
-- 
2.15.1