From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E822120F8F for ; Fri, 21 Jul 2023 19:20:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FFAEC433C7; Fri, 21 Jul 2023 19:20:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689967241; bh=N0zUD4oLOWAoNoJeqv85jNsoEXADyMEc3B/d1WQ2E4c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G4ujdW/EvdG2Gb2+xNU9Y1lEkoxQUKuqffLfWftAoUoO9YJjKm/WC4e5y9FZcbIap 1pUak+IZ8+G2s8OfTzpQtB7QrjAyVxTJJYannOTrRGEgMVH86uLrqnba2tbo3EAblm P1/tmSc/tmVjZ/mIcPUucu8pQ21Ii/IsOsHeqDvk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Fainelli , Andrew Lunn , Jakub Kicinski Subject: [PATCH 6.1 094/223] net: bcmgenet: Ensure MDIO unregistration has clocks enabled Date: Fri, 21 Jul 2023 18:05:47 +0200 Message-ID: <20230721160524.871089383@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721160520.865493356@linuxfoundation.org> References: <20230721160520.865493356@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Florian Fainelli commit 1b5ea7ffb7a3bdfffb4b7f40ce0d20a3372ee405 upstream. With support for Ethernet PHY LEDs having been added, while unregistering a MDIO bus and its child device liks PHYs there may be "late" accesses to the MDIO bus. One typical use case is setting the PHY LEDs brightness to OFF for instance. We need to ensure that the MDIO bus controller remains entirely functional since it runs off the main GENET adapter clock. Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20230617155500.4005881-1-andrew@lunn.ch/ Fixes: 9a4e79697009 ("net: bcmgenet: utilize generic Broadcom UniMAC MDIO controller driver") Signed-off-by: Florian Fainelli Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20230622103107.1760280-1-florian.fainelli@broadcom.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/broadcom/genet/bcmmii.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -664,5 +664,7 @@ void bcmgenet_mii_exit(struct net_device if (of_phy_is_fixed_link(dn)) of_phy_deregister_fixed_link(dn); of_node_put(priv->phy_dn); + clk_prepare_enable(priv->clk); platform_device_unregister(priv->mii_pdev); + clk_disable_unprepare(priv->clk); }