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([82.78.167.103]) by smtp.gmail.com with ESMTPSA id ll9-20020a170907190900b00a1da2f7c1d8sm9240877ejc.77.2023.12.14.03.46.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Dec 2023 03:46:51 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, richardcochran@gmail.com, p.zabel@pengutronix.de, yoshihiro.shimoda.uh@renesas.com, wsa+renesas@sang-engineering.com, geert+renesas@glider.be Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Claudiu Beznea Subject: [PATCH net-next v2 20/21] net: ravb: Do not apply RX CSUM settings to hardware if the interface is down Date: Thu, 14 Dec 2023 13:45:59 +0200 Message-Id: <20231214114600.2451162-21-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231214114600.2451162-1-claudiu.beznea.uj@bp.renesas.com> References: <20231214114600.2451162-1-claudiu.beznea.uj@bp.renesas.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Claudiu Beznea Do not apply the RX CSUM settings to hardware if the interface is down. In case runtime PM is enabled, and while the interface is down, the IP will be in reset mode (as for some platforms disabling/enabling the clocks will switch the IP to standby mode, which will lead to losing registers' content) and applying settings in reset mode is not an option. Instead, cache the RX CSUM settings and apply them in ravb_open(). Commit prepares for the addition of runtime PM. Signed-off-by: Claudiu Beznea --- Changes in v2: - none; this patch is new drivers/net/ethernet/renesas/ravb_main.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/etherne= t/renesas/ravb_main.c index 633346b6cd7c..9ff943dff522 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1868,6 +1868,15 @@ static int ravb_open(struct net_device *ndev) if (info->gptp || info->ccc_gac) ravb_ptp_init(ndev, priv->pdev); =20 + /* Apply features that might have been changed while the interface + * was down. + */ + if (ndev->hw_features & NETIF_F_RXCSUM) { + u32 val =3D (ndev->features & NETIF_F_RXCSUM) ? ECMR_RCSC : 0; + + ravb_modify(ndev, ECMR, ECMR_RCSC, val); + } + /* PHY control start */ error =3D ravb_phy_start(ndev); if (error) @@ -2337,6 +2346,9 @@ static void ravb_set_rx_csum(struct net_device *ndev,= bool enable) struct ravb_private *priv =3D netdev_priv(ndev); unsigned long flags; =20 + if (!netif_running(ndev)) + return; + spin_lock_irqsave(&priv->lock, flags); =20 /* Disable TX and RX */ --=20 2.39.2