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Miller" , Andrew Lunn , Eric Dumazet , Florian Fainelli , Jakub Kicinski , Paolo Abeni , Vladimir Oltean , Woojung Huh , Arun Ramadoss , Conor Dooley , Krzysztof Kozlowski , Rob Herring Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, UNGLinuxDriver@microchip.com, "Russell King (Oracle)" , devicetree@vger.kernel.org Subject: [PATCH net-next v4 9/9] net: dsa: microchip: do not reset the switch on shutdown if WoL is active Date: Mon, 16 Oct 2023 16:12:56 +0200 Message-Id: <20231016141256.2011861-10-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231016141256.2011861-1-o.rempel@pengutronix.de> References: <20231016141256.2011861-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Mon, 16 Oct 2023 07:13:47 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1779921718231611079 X-GMAIL-MSGID: 1779921718231611079 For Wake on Lan we should not reconfigure, reset or power down the switch on shut down sequence. Signed-off-by: Oleksij Rempel Reviewed-by: Florian Fainelli --- drivers/net/dsa/microchip/ksz_common.c | 29 +++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index 85513318d165..abfd9dcab450 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -3565,6 +3565,33 @@ static int ksz_set_wol(struct dsa_switch *ds, int port, return -EOPNOTSUPP; } +/** + * ksz_wol_is_active - Check if Wake-on-LAN is active on any port. + * @dev: The device structure. + * + * This function iterates through each user port on the switch, checking if + * Wake-on-LAN (WoL) is active on any of them. + * + * Return: true if WoL is active on any port, false otherwise. + */ +static bool ksz_wol_is_active(struct ksz_device *dev) +{ + struct dsa_port *dp; + + if (!dev->wakeup_source) + return false; + + dsa_switch_for_each_user_port(dp, dev->ds) { + struct ethtool_wolinfo wol; + + ksz_get_wol(dev->ds, dp->index, &wol); + if (wol.wolopts) + return true; + } + + return false; +} + static int ksz_port_set_mac_address(struct dsa_switch *ds, int port, const unsigned char *addr) { @@ -3822,7 +3849,7 @@ EXPORT_SYMBOL(ksz_switch_alloc); */ void ksz_switch_shutdown(struct ksz_device *dev) { - if (dev->dev_ops->reset) + if (dev->dev_ops->reset && !ksz_wol_is_active(dev)) dev->dev_ops->reset(dev); dsa_switch_shutdown(dev->ds);