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 EAAFF2FC89C; Fri, 21 Nov 2025 13:51:29 +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=1763733090; cv=none; b=DHCen/9ebZ5W9xRPliRsven5jfmrbRbnY3UyoSNdTOCEiTxnxOWxOk6ioDxg3aN14f+dw2ncfLOKDf8iR6StzY/A/Z7rorkcbJIAAtiumtMZi4DrC2PE6utbdiXEN8ZXwSZKlklcIj4QVGYjOmOzAFEqFWOTp7hpPzFokZoxPkY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763733090; c=relaxed/simple; bh=9gLh4+ahTkaCAyfH80frEwj0a4SjmWtnO+3c8UFRAAw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CEFbI7jLbuQUpw8HOy96PlDQHVcn14imOQEiMUVgL4IZJeB9muszoGRPxlhaxBEIoJz6PA5LMrnQkEygzHExUUpOGHgcoahWjvG7knAKHUYkfp3DR0JNg3QiXgmi2b/DtNrmtHRWnysG5CeA0HR8bsIYXGNev0R6R6mJwU5KlLk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=snQbHu2G; 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="snQbHu2G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4446AC4CEF1; Fri, 21 Nov 2025 13:51:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763733089; bh=9gLh4+ahTkaCAyfH80frEwj0a4SjmWtnO+3c8UFRAAw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=snQbHu2GyYDc1RSohL8TkEUXT1LCas/orcv50xmJcVgJMar26XNLrV0D3LeqwMzsJ oKUtri8x6jSzzshmPAgdubDwo+2ZZoXpYpx9Q6DL9G4MvSxtSBqMq1f8dV1ONBjAXo qWqSnPBd/JzrUXma2/VsIbVszILUlYx2/m7gkgFA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jonas Gorski , Florian Fainelli , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.6 346/529] net: dsa: b53: fix enabling ip multicast Date: Fri, 21 Nov 2025 14:10:45 +0100 Message-ID: <20251121130243.343038470@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130230.985163914@linuxfoundation.org> References: <20251121130230.985163914@linuxfoundation.org> User-Agent: quilt/0.69 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-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jonas Gorski [ Upstream commit c264294624e956a967a9e2e5fa41e3273340b089 ] In the New Control register bit 1 is either reserved, or has a different function: Out of Range Error Discard When enabled, the ingress port discards any frames if the Length field is between 1500 and 1536 (excluding 1500 and 1536) and with good CRC. The actual bit for enabling IP multicast is bit 0, which was only explicitly enabled for BCM5325 so far. For older switch chips, this bit defaults to 0, so we want to enable it as well, while newer switch chips default to 1, and their documentation says "It is illegal to set this bit to zero." So drop the wrong B53_IPMC_FWD_EN define, enable the IP multicast bit also for other switch chips. While at it, rename it to (B53_)IP_MC as that is how it is called in Broadcom code. Fixes: 63cc54a6f073 ("net: dsa: b53: Fix egress flooding settings") Signed-off-by: Jonas Gorski Reviewed-by: Florian Fainelli Link: https://patch.msgid.link/20251102100758.28352-2-jonas.gorski@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/dsa/b53/b53_common.c | 4 ++-- drivers/net/dsa/b53/b53_regs.h | 3 +-- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 4e850e5f7d220..3c5bf65aca6a2 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -349,11 +349,11 @@ static void b53_set_forwarding(struct b53_device *dev, int enable) * frames should be flooded or not. */ b53_read8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, &mgmt); - mgmt |= B53_UC_FWD_EN | B53_MC_FWD_EN | B53_IPMC_FWD_EN; + mgmt |= B53_UC_FWD_EN | B53_MC_FWD_EN | B53_IP_MC; b53_write8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, mgmt); } else { b53_read8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, &mgmt); - mgmt |= B53_IP_MCAST_25; + mgmt |= B53_IP_MC; b53_write8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, mgmt); } } diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h index 3179fe58de6b6..38e2d60dab7d5 100644 --- a/drivers/net/dsa/b53/b53_regs.h +++ b/drivers/net/dsa/b53/b53_regs.h @@ -104,8 +104,7 @@ /* IP Multicast control (8 bit) */ #define B53_IP_MULTICAST_CTRL 0x21 -#define B53_IP_MCAST_25 BIT(0) -#define B53_IPMC_FWD_EN BIT(1) +#define B53_IP_MC BIT(0) #define B53_UC_FWD_EN BIT(6) #define B53_MC_FWD_EN BIT(7) -- 2.51.0