netdev - [PATCH net-next 02/15] net: dsa: tag_brcm: use the dsa_xmit_port

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251127120902.292555-3-vladimir.oltean@nxp.com>
Date: Thu, 27 Nov 2025 14:08:49 +0200
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: Andrew Lunn <andrew@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Jonas Gorski <jonas.gorski@...il.com>
Subject: [PATCH net-next 02/15] net: dsa: tag_brcm: use the dsa_xmit_port_mask() helper

The "brcm" and "brcm-prepend" tagging protocols populate a bit mask for
the TX ports, so we can use dsa_xmit_port_mask() to centralize the
decision of how to set that field. The port mask is written u8 by u8,
first the high octet and then the low octet.

Cc: Florian Fainelli <florian.fainelli@...adcom.com>
Cc: Jonas Gorski <jonas.gorski@...il.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/tag_brcm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
index eadb358179ce..cf9420439054 100644
--- a/net/dsa/tag_brcm.c
+++ b/net/dsa/tag_brcm.c
@@ -92,6 +92,7 @@ static struct sk_buff *brcm_tag_xmit_ll(struct sk_buff *skb,
 {
 	struct dsa_port *dp = dsa_user_to_port(dev);
 	u16 queue = skb_get_queue_mapping(skb);
+	u16 port_mask;
 	u8 *brcm_tag;
 
 	/* The Ethernet switch we are interfaced with needs packets to be at
@@ -119,10 +120,9 @@ static struct sk_buff *brcm_tag_xmit_ll(struct sk_buff *skb,
 	brcm_tag[0] = (1 << BRCM_OPCODE_SHIFT) |
 		       ((queue & BRCM_IG_TC_MASK) << BRCM_IG_TC_SHIFT);
 	brcm_tag[1] = 0;
-	brcm_tag[2] = 0;
-	if (dp->index == 8)
-		brcm_tag[2] = BRCM_IG_DSTMAP2_MASK;
-	brcm_tag[3] = (1 << dp->index) & BRCM_IG_DSTMAP1_MASK;
+	port_mask = dsa_xmit_port_mask(skb, dev);
+	brcm_tag[2] = (port_mask >> 8) & BRCM_IG_DSTMAP2_MASK;
+	brcm_tag[3] = port_mask & BRCM_IG_DSTMAP1_MASK;
 
 	/* Now tell the conduit network device about the desired output queue
 	 * as well
-- 
2.43.0