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 646F1337EB4; Wed, 17 Sep 2025 12:41:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758112890; cv=none; b=FHRhd9qMM5fYYMAFWhSt9Eb2UITtG1QBxdlatw2lrbvlYh1IEawy57znHWrWuJQ/I7KxAVHGw76EWYY7PaIf44kkQJlMWLH+FxaT2XNE0VfWb6R3zDXwQzxGhD0FgfGsdrhkQtwjADh3Hu8XxuuV2AV7kkgj5RYm4Sh3tQEMlKs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758112890; c=relaxed/simple; bh=7xPE+CFnaylDUP0DzFMA+ZP3z1ao3oW+NVeAPBeB4rA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=BhYDBIzjuxaya6vNYe7/FlQEL9xb7rEX04jOE1Qji3d7it95b2XOFZfYozLGW9jMS73ED/4YmdEipNkIL9E9Y04k0tK1enm9UFrPcbW8vdf8HArQanmzlR2ddV+r+Solr5ucfB+U8SSyI4aSQ2gRYyqpO17mtpV4CCUZIES4uuI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Hg8PC8JF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Hg8PC8JF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5223C4CEF0; Wed, 17 Sep 2025 12:41:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758112890; bh=7xPE+CFnaylDUP0DzFMA+ZP3z1ao3oW+NVeAPBeB4rA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hg8PC8JFF6XjwiykET/qDJdNqa2kMoBQlmzv6wRMSzY75b4guri2zvsvipIuNx7lL jVuWDTt0kjukD3V0WshpV2dXfOCehmcsTUcthlxDUndCF0SXzpasroHgcLHL9yR11J IOqJSVa2Z9hOXs7bhCjCQb5UKtdI7oRbO8suuiGQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Hubert=20Wi=C5=9Bniewski?= , Oleksij Rempel , Xu Yang , Jakub Kicinski Subject: [PATCH 6.16 063/189] net: usb: asix: ax88772: drop phylink use in PM to avoid MDIO runtime PM wakeups Date: Wed, 17 Sep 2025 14:32:53 +0200 Message-ID: <20250917123353.409761498@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250917123351.839989757@linuxfoundation.org> References: <20250917123351.839989757@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore 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 6.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oleksij Rempel commit 5537a4679403423e0b49c95b619983a4583d69c5 upstream. Drop phylink_{suspend,resume}() from ax88772 PM callbacks. MDIO bus accesses have their own runtime-PM handling and will try to wake the device if it is suspended. Such wake attempts must not happen from PM callbacks while the device PM lock is held. Since phylink {sus|re}sume may trigger MDIO, it must not be called in PM context. No extra phylink PM handling is required for this driver: - .ndo_open/.ndo_stop control the phylink start/stop lifecycle. - ethtool/phylib entry points run in process context, not PM. - phylink MAC ops program the MAC on link changes after resume. Fixes: e0bffe3e6894 ("net: asix: ax88772: migrate to phylink") Reported-by: Hubert Wiśniewski Cc: stable@vger.kernel.org Signed-off-by: Oleksij Rempel Tested-by: Hubert Wiśniewski Tested-by: Xu Yang Link: https://patch.msgid.link/20250908112619.2900723-1-o.rempel@pengutronix.de Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/usb/asix_devices.c | 13 ------------- 1 file changed, 13 deletions(-) --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -607,15 +607,8 @@ static const struct net_device_ops ax887 static void ax88772_suspend(struct usbnet *dev) { - struct asix_common_private *priv = dev->driver_priv; u16 medium; - if (netif_running(dev->net)) { - rtnl_lock(); - phylink_suspend(priv->phylink, false); - rtnl_unlock(); - } - /* Stop MAC operation */ medium = asix_read_medium_status(dev, 1); medium &= ~AX_MEDIUM_RE; @@ -644,12 +637,6 @@ static void ax88772_resume(struct usbnet for (i = 0; i < 3; i++) if (!priv->reset(dev, 1)) break; - - if (netif_running(dev->net)) { - rtnl_lock(); - phylink_resume(priv->phylink); - rtnl_unlock(); - } } static int asix_resume(struct usb_interface *intf)