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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Markus Schneider-Pargmann , =?UTF-8?q?Martin=20Hundeb=C3=B8ll?= , Michal Kubiak , Simon Horman , Tony Lindgren , Judith Mendez Cc: Matthias Schiffer , Linux regression tracking , linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 7/7] can: m_can: Limit coalescing to peripheral instances Date: Fri, 26 Jul 2024 21:59:44 +0200 Message-ID: <20240726195944.2414812-8-msp@baylibre.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240726195944.2414812-1-msp@baylibre.com> References: <20240726195944.2414812-1-msp@baylibre.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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 7c9ad9f7174e..663eb4247029 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -2182,7 +2182,7 @@ static int m_can_set_coalesce(struct net_device *dev, return 0; } =20 -static const struct ethtool_ops m_can_ethtool_ops =3D { +static const struct ethtool_ops m_can_ethtool_ops_coalescing =3D { .supported_coalesce_params =3D ETHTOOL_COALESCE_RX_USECS_IRQ | ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ | ETHTOOL_COALESCE_TX_USECS_IRQ | @@ -2193,18 +2193,20 @@ static const struct ethtool_ops m_can_ethtool_ops = =3D { .set_coalesce =3D m_can_set_coalesce, }; =20 -static const struct ethtool_ops m_can_ethtool_ops_polling =3D { +static const struct ethtool_ops m_can_ethtool_ops =3D { .get_ts_info =3D ethtool_op_get_ts_info, }; =20 -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 =3D cdev->net; + dev->flags |=3D IFF_ECHO; /* we support local echo */ dev->netdev_ops =3D &m_can_netdev_ops; - if (dev->irq) - dev->ethtool_ops =3D &m_can_ethtool_ops; + if (dev->irq && cdev->is_peripheral) + dev->ethtool_ops =3D &m_can_ethtool_ops_coalescing; else - dev->ethtool_ops =3D &m_can_ethtool_ops_polling; + dev->ethtool_ops =3D &m_can_ethtool_ops; =20 return register_candev(dev); } @@ -2390,7 +2392,7 @@ int m_can_class_register(struct m_can_classdev *cdev) if (ret) goto rx_offload_del; =20 - ret =3D register_m_can_dev(cdev->net); + ret =3D register_m_can_dev(cdev); if (ret) { dev_err(cdev->dev, "registering %s failed (err=3D%d)\n", cdev->net->name, ret); --=20 2.45.2