netdev - [PATCH net-next 5/5] net: phylink: provide fixed state for 1000base-X and 2500base-X

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: <E1tVuG1-000BXo-S7@rmk-PC.armlinux.org.uk>
Date: Thu, 09 Jan 2025 15:15:37 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexander Couzens <lynxis@...0.eu>,
	Alexander Duyck <alexanderduyck@...com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"Ar__n__ __NAL" <arinc.unal@...nc9.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Daniel Golle <daniel@...rotopia.org>,
	Daniel Machon <daniel.machon@...rochip.com>,
	"David S. Miller" <davem@...emloft.net>,
	DENG Qingfang <dqfext@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Horatiu Vultur <horatiu.vultur@...rochip.com>,
	Ioana Ciornei <ioana.ciornei@....com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jose Abreu <Jose.Abreu@...opsys.com>,
	kernel-team@...a.com,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Madalin Bucur <madalin.bucur@....com>,
	Marcin Wojtas <marcin.s.wojtas@...il.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Michal Simek <michal.simek@....com>,
	netdev@...r.kernel.org,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
	Sean Anderson <sean.anderson@...o.com>,
	Sean Wang <sean.wang@...iatek.com>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Taras Chornyi <taras.chornyi@...ision.eu>,
	UNGLinuxDriver@...rochip.com,
	Vladimir Oltean <olteanv@...il.com>,
	Eric Woudstra <ericwouds@...il.com>
Subject: [PATCH net-next 5/5] net: phylink: provide fixed state for 1000base-X
 and 2500base-X

When decoding clause 22 state, if in-band is disabled and using either
1000base-X or 2500base-X, rather than reporting link-down, we know the
speed, and we only support full duplex. Pause modes taken from XPCS.

This fixes a problem reported by Eric Woudstra.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/phylink.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 5174c22e2091..0ae96d1376b4 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -3882,27 +3882,36 @@ void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
 	if (!state->link)
 		return;
 
-	/* If in-band is disabled, then the advertisement data is not
-	 * meaningful.
-	 */
-	if (neg_mode != PHYLINK_PCS_NEG_INBAND_ENABLED)
-		return;
-
 	switch (state->interface) {
 	case PHY_INTERFACE_MODE_1000BASEX:
-		phylink_decode_c37_word(state, lpa, SPEED_1000);
+		if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) {
+			phylink_decode_c37_word(state, lpa, SPEED_1000);
+		} else {
+			state->speed = SPEED_1000;
+			state->duplex = DUPLEX_FULL;
+			state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;
+		}
 		break;
 
 	case PHY_INTERFACE_MODE_2500BASEX:
-		phylink_decode_c37_word(state, lpa, SPEED_2500);
+		if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) {
+			phylink_decode_c37_word(state, lpa, SPEED_2500);
+		} else {
+			state->speed = SPEED_2500;
+			state->duplex = DUPLEX_FULL;
+			state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;
+		}
 		break;
 
 	case PHY_INTERFACE_MODE_SGMII:
 	case PHY_INTERFACE_MODE_QSGMII:
-		phylink_decode_sgmii_word(state, lpa);
+		if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
+			phylink_decode_sgmii_word(state, lpa);
 		break;
+
 	case PHY_INTERFACE_MODE_QUSGMII:
-		phylink_decode_usgmii_word(state, lpa);
+		if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
+			phylink_decode_usgmii_word(state, lpa);
 		break;
 
 	default:
-- 
2.30.2