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Message-ID: <20240910172214.2415568-1-sashal@kernel.org>
Date: Tue, 10 Sep 2024 13:21:46 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Markus Schneider-Pargmann <msp@...libre.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
Sasha Levin <sashal@...nel.org>,
rcsekar@...sung.com,
mailhol.vincent@...adoo.fr,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
linux-can@...r.kernel.org,
netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 6.10 01/18] can: m_can: Limit coalescing to peripheral instances
From: Markus Schneider-Pargmann <msp@...libre.com>
[ Upstream commit e443d15b949952ee039b731d5c35bcbafa300024 ]
The use of coalescing for non-peripheral chips in the current
implementation is limited to non-existing. Disable the possibility to
set coalescing through ethtool.
Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
Link: https://lore.kernel.org/all/20240805183047.305630-8-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/net/can/m_can/m_can.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 14b231c4d7ec..6f5899f2e593 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -2129,7 +2129,7 @@ static int m_can_set_coalesce(struct net_device *dev,
return 0;
}
-static const struct ethtool_ops m_can_ethtool_ops = {
+static const struct ethtool_ops m_can_ethtool_ops_coalescing = {
.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS_IRQ |
ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ |
ETHTOOL_COALESCE_TX_USECS_IRQ |
@@ -2140,18 +2140,20 @@ static const struct ethtool_ops m_can_ethtool_ops = {
.set_coalesce = m_can_set_coalesce,
};
-static const struct ethtool_ops m_can_ethtool_ops_polling = {
+static const struct ethtool_ops m_can_ethtool_ops = {
.get_ts_info = ethtool_op_get_ts_info,
};
-static int register_m_can_dev(struct net_device *dev)
+static int register_m_can_dev(struct m_can_classdev *cdev)
{
+ struct net_device *dev = cdev->net;
+
dev->flags |= IFF_ECHO; /* we support local echo */
dev->netdev_ops = &m_can_netdev_ops;
- if (dev->irq)
- dev->ethtool_ops = &m_can_ethtool_ops;
+ if (dev->irq && cdev->is_peripheral)
+ dev->ethtool_ops = &m_can_ethtool_ops_coalescing;
else
- dev->ethtool_ops = &m_can_ethtool_ops_polling;
+ dev->ethtool_ops = &m_can_ethtool_ops;
return register_candev(dev);
}
@@ -2337,7 +2339,7 @@ int m_can_class_register(struct m_can_classdev *cdev)
if (ret)
goto rx_offload_del;
- ret = register_m_can_dev(cdev->net);
+ ret = register_m_can_dev(cdev);
if (ret) {
dev_err(cdev->dev, "registering %s failed (err=%d)\n",
cdev->net->name, ret);
--
2.43.0
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