linux-kernel - [PATCH 3/4 net] qca_spi: Fix ethtool -G iface tx behavior

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Date:   Tue, 21 Nov 2023 17:30:03 +0100
From:   Stefan Wahren <wahrenst@....net>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Lino Sanfilippo <LinoSanfilippo@....de>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stefan Wahren <wahrenst@....net>
Subject: [PATCH 3/4 net] qca_spi: Fix ethtool -G iface tx behavior

After calling ethtool -g it was not possible to adjust the TX ring size
again. The reason for this is that the readonly setting rx_pending get
initialized and after that the range check in qcaspi_set_ringparam()
fails regardless of the provided parameter. Since there is no adjustable
RX ring at all, drop it from qcaspi_get_ringparam().

Fixes: 291ab06ecf67 ("net: qualcomm: new Ethernet over SPI driver for QCA7000")
Signed-off-by: Stefan Wahren <wahrenst@....net>
---
 drivers/net/ethernet/qualcomm/qca_debug.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/qca_debug.c b/drivers/net/ethernet/qualcomm/qca_debug.c
index 6f2fa2a42770..613eb688cba2 100644
--- a/drivers/net/ethernet/qualcomm/qca_debug.c
+++ b/drivers/net/ethernet/qualcomm/qca_debug.c
@@ -252,9 +252,7 @@ qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring,
 {
 	struct qcaspi *qca = netdev_priv(dev);

-	ring->rx_max_pending = 4;
 	ring->tx_max_pending = TX_RING_MAX_LEN;
-	ring->rx_pending = 4;
 	ring->tx_pending = qca->txr.count;
 }

--
2.34.1