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 507A885260; Tue, 26 Aug 2025 12:57:23 +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=1756213043; cv=none; b=AvTNr7TeRjORWLW2vIGO3QbsutzIHAQHXI5Tl1sl5UIdsxh3EPiC8OfjIwH1fdTMnrYW+JinPaQRO3sYroOk+tOeJd4g7EJ5AuzmrhtPeOSZMvunNI/Xp6UeQBFXlkXliJwMZNM79URZHL0p2M2s9fAqo5/96sADPYIct96EJU4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756213043; c=relaxed/simple; bh=jRiiUrCxOYDln0qHiWeGobrwIgpM8OiBAv8b7OC9jUc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SRSQUAlbCS3PNX1ZKKolq4W+Yhy4GkZB72nIDyEguZ6pyE9YQNsMrhOsxCsqcfX7k0QjpOQRvauI0OTEjKh9cvIRwD25knz2JfH4p7Z2hGwiRNIMaUSbjiYlwTHMHeyntIbCF0FoUpkpfg1JUXCOpLYN5uhSP8WQ060jOqkeYFo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vLn/Rho9; 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="vLn/Rho9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC5CCC4CEF1; Tue, 26 Aug 2025 12:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756213043; bh=jRiiUrCxOYDln0qHiWeGobrwIgpM8OiBAv8b7OC9jUc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vLn/Rho9Likn+CqaABuqa+5T6tCe27PFoINEkY3ZBvc6X1GpdjmvArUgPgRxAJCBo sGnUTKsHVE5TkAbglZvqjAODs1O6XWeZnwJryvi3L8FbVgPfwOy3ghEYTh4u5jYXYc vouG0DQZMZB0PXJPj1Sb4inxWvw8yPQK+itbU59w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Fainelli , =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.6 200/587] net: dsa: b53: prevent SWITCH_CTRL access on BCM5325 Date: Tue, 26 Aug 2025 13:05:49 +0200 Message-ID: <20250826110958.028745595@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110952.942403671@linuxfoundation.org> References: <20250826110952.942403671@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Álvaro Fernández Rojas [ Upstream commit 22ccaaca43440e90a3b68d2183045b42247dc4be ] BCM5325 doesn't implement SWITCH_CTRL register so we should avoid reading or writing it. Reviewed-by: Florian Fainelli Signed-off-by: Álvaro Fernández Rojas Link: https://patch.msgid.link/20250614080000.1884236-8-noltari@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/dsa/b53/b53_common.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 5daefb60885e..6378e3f0f1fe 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -339,11 +339,12 @@ static void b53_set_forwarding(struct b53_device *dev, int enable) b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt); - /* Include IMP port in dumb forwarding mode - */ - b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt); - mgmt |= B53_MII_DUMB_FWDG_EN; - b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt); + if (!is5325(dev)) { + /* Include IMP port in dumb forwarding mode */ + b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt); + mgmt |= B53_MII_DUMB_FWDG_EN; + b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt); + } /* Look at B53_UC_FWD_EN and B53_MC_FWD_EN to decide whether * frames should be flooded or not. -- 2.39.5