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 1CEA331AF15; Mon, 18 Aug 2025 13:31:31 +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=1755523892; cv=none; b=bBCznldxAilo8FUWv+wI941E/jiNnaJoKQLLrk6w44CEwDrcYt2cnEwVLBwqID93Pfmw5kAJ7J0MQC0BSpWkSI9WaoMbD/na+hSj4T63CJxbiBQ13JAFQmRngxi2iwnffwvZGIGpUWUNctnlnv8Dkn6PuMl7ObGkyqV/NOI/TP8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755523892; c=relaxed/simple; bh=HvrRzyP2k9nyn0Pmei/u2syi/dLWRlk9KB6BJIIpqKU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=U/broJCvNlsFfesUR6ZFRRd9s0HC5SITiP2t8reAUO07LFacCGVUK7G0y8VRfD0Cq8521j9lDtV0cTexMqS7NXZlkHEkGILIbkvqz/1jMoPGLUHHNf2p+Hq2AsbfQvRav5GCe6/yWBS/ea7y54wHwWnm75bX6aX+UFjWXOmMDDw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=qfCLeVDI; 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="qfCLeVDI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 313B7C4CEEB; Mon, 18 Aug 2025 13:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755523891; bh=HvrRzyP2k9nyn0Pmei/u2syi/dLWRlk9KB6BJIIpqKU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qfCLeVDI1Mv2gwxNiavQStFoTS+9mG0WR11UWESqOhd3HE2Q5n22i1enWIf1Z6+VE tYgzSesKrmzQcX4P1XCn3A4G1hevwY539oo7Szua2i7ZCHdiiR3IOdxVg/DwxiGTro YthKXgYAABJtaZBSiMLLdLRLe7fGQ8LjfFrphztA= 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 6.15 305/515] net: dsa: b53: prevent GMII_PORT_OVERRIDE_CTRL access on BCM5325 Date: Mon, 18 Aug 2025 14:44:51 +0200 Message-ID: <20250818124510.180639519@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124458.334548733@linuxfoundation.org> References: <20250818124458.334548733@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 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Álvaro Fernández Rojas [ Upstream commit 37883bbc45a8555d6eca88d3a9730504d2dac86c ] BCM5325 doesn't implement GMII_PORT_OVERRIDE_CTRL register so we should avoid reading or writing it. PORT_OVERRIDE_RX_FLOW and PORT_OVERRIDE_TX_FLOW aren't defined on BCM5325 and we should use PORT_OVERRIDE_LP_FLOW_25 instead. Reviewed-by: Florian Fainelli Signed-off-by: Álvaro Fernández Rojas Link: https://patch.msgid.link/20250614080000.1884236-12-noltari@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/dsa/b53/b53_common.c | 21 +++++++++++++++++---- drivers/net/dsa/b53/b53_regs.h | 1 + 2 files changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 55e1844a5e9c..8abbcc588267 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -1274,6 +1274,8 @@ static void b53_force_link(struct b53_device *dev, int port, int link) if (port == dev->imp_port) { off = B53_PORT_OVERRIDE_CTRL; val = PORT_OVERRIDE_EN; + } else if (is5325(dev)) { + return; } else { off = B53_GMII_PORT_OVERRIDE_CTRL(port); val = GMII_PO_EN; @@ -1298,6 +1300,8 @@ static void b53_force_port_config(struct b53_device *dev, int port, if (port == dev->imp_port) { off = B53_PORT_OVERRIDE_CTRL; val = PORT_OVERRIDE_EN; + } else if (is5325(dev)) { + return; } else { off = B53_GMII_PORT_OVERRIDE_CTRL(port); val = GMII_PO_EN; @@ -1328,10 +1332,19 @@ static void b53_force_port_config(struct b53_device *dev, int port, return; } - if (rx_pause) - reg |= PORT_OVERRIDE_RX_FLOW; - if (tx_pause) - reg |= PORT_OVERRIDE_TX_FLOW; + if (rx_pause) { + if (is5325(dev)) + reg |= PORT_OVERRIDE_LP_FLOW_25; + else + reg |= PORT_OVERRIDE_RX_FLOW; + } + + if (tx_pause) { + if (is5325(dev)) + reg |= PORT_OVERRIDE_LP_FLOW_25; + else + reg |= PORT_OVERRIDE_TX_FLOW; + } b53_write8(dev, B53_CTRL_PAGE, off, reg); } diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h index d31c8ad9a9b6..25d25bd1071f 100644 --- a/drivers/net/dsa/b53/b53_regs.h +++ b/drivers/net/dsa/b53/b53_regs.h @@ -95,6 +95,7 @@ #define PORT_OVERRIDE_SPEED_10M (0 << PORT_OVERRIDE_SPEED_S) #define PORT_OVERRIDE_SPEED_100M (1 << PORT_OVERRIDE_SPEED_S) #define PORT_OVERRIDE_SPEED_1000M (2 << PORT_OVERRIDE_SPEED_S) +#define PORT_OVERRIDE_LP_FLOW_25 BIT(3) /* BCM5325 only */ #define PORT_OVERRIDE_RV_MII_25 BIT(4) /* BCM5325 only */ #define PORT_OVERRIDE_RX_FLOW BIT(4) #define PORT_OVERRIDE_TX_FLOW BIT(5) -- 2.39.5