linux-kernel - [PATCH 4.9 21/21] net: mvneta: eliminate wrong call to handle rx descriptor error

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Message-Id: <20171227164601.096831176@linuxfoundation.org>
Date:   Wed, 27 Dec 2017 17:46:37 +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, Yelena Krivosheev <yelena@...vell.com>,
        Dmitri Epshtein <dima@...vell.com>,
        Gregory CLEMENT <gregory.clement@...e-electrons.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 21/21] net: mvneta: eliminate wrong call to handle rx descriptor error

4.9-stable review patch.  If anyone has any objections, please let me know.

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

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

commit 2eecb2e04abb62ef8ea7b43e1a46bdb5b99d1bf8 upstream.

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]
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>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/marvell/mvneta.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -1909,9 +1909,9 @@ static int mvneta_rx_swbm(struct mvneta_

 		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;
 		}