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Miller" , Andrew Lunn , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vladimir Oltean , Woojung Huh , Arun Ramadoss , Conor Dooley , Krzysztof Kozlowski , Rob Herring Cc: kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, UNGLinuxDriver@microchip.com, "Russell King (Oracle)" , devicetree@vger.kernel.org References: <20231018113913.3629151-1-o.rempel@pengutronix.de> <20231018113913.3629151-6-o.rempel@pengutronix.de> From: Florian Fainelli In-Reply-To: <20231018113913.3629151-6-o.rempel@pengutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/18/23 04:39, Oleksij Rempel wrote: > Introduce Wake on Magic Packet (WoL) functionality to the ksz9477 > driver. > > Major changes include: > > 1. Extending the `ksz9477_handle_wake_reason` function to identify Magic > Packet wake events alongside existing wake reasons. > > 2. Updating the `ksz9477_get_wol` and `ksz9477_set_wol` functions to > handle WAKE_MAGIC alongside the existing WAKE_PHY option, and to > program the switch's MAC address register accordingly when Magic > Packet wake-up is enabled. This change will prevent WAKE_MAGIC > activation if the related port has a different MAC address compared > to a MAC address already used by HSR or an already active WAKE_MAGIC > on another port. > > 3. Adding a restriction in `ksz_port_set_mac_address` to prevent MAC > address changes on ports with active Wake on Magic Packet, as the > switch's MAC address register is utilized for this feature. > > Signed-off-by: Oleksij Rempel This looks good to me, just one suggestion below [snip] > + if (pme_ctrl_old == pme_ctrl) > + return 0; > + > + /* To keep reference count of MAC address, we should do this > + * operation only on change of WOL settings. > + */ > + if (!(pme_ctrl_old & PME_WOL_MAGICPKT) && > + (pme_ctrl & PME_WOL_MAGICPKT)) { Maybe use a temporary variable for that condition since you re-use it below in case you failed to perform the write of the pme_ctrl value. It would be more readable IMHO, something like: bool magicpkt_was_disabled = !(pme_ctrl_old & PME_WOL_MAGICPKT) && (pme_ctrl & PME_WOL_MAGICPKT)); -- Florian