linux-kernel - [PATCH net-next 1/3] net: cpsw: return proper RX timestamping filter in cpsw_hwtstamp

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Message-ID: <20250508194825.3058929-2-vladimir.oltean@nxp.com>
Date: Thu,  8 May 2025 22:48:23 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org
Cc: Köry Maincent <kory.maincent@...tlin.com>,
	Andrew Lunn <andrew@...n.ch>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	Roger Quadros <rogerq@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Richard Cochran <richardcochran@...il.com>,
	Russell King <linux@...linux.org.uk>,
	linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org
Subject: [PATCH net-next 1/3] net: cpsw: return proper RX timestamping filter in cpsw_hwtstamp_get()

priv->rx_ts_enabled is a boolean variable (0 or 1). Overlapped over enum
hwtstamp_rx_filters, it makes cfg.rx_filter take the value of either
HWTSTAMP_FILTER_NONE (when 0) or HWTSTAMP_FILTER_ALL (when 1).

But this is inconsistent with what is returned in cpsw_hwtstamp_set().
There, HWTSTAMP_FILTER_ALL is refused (-ERANGE), and a subset of the RX
filters requestable by user space are all replaced with
HWTSTAMP_FILTER_PTP_V2_EVENT. So the driver should be reporting this
value during SIOCGHWTSTAMP as well.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/ethernet/ti/cpsw_priv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
index 6fe4edabba44..68d8f7ea0e44 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.c
+++ b/drivers/net/ethernet/ti/cpsw_priv.c
@@ -687,7 +687,8 @@ static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
 
 	cfg.flags = 0;
 	cfg.tx_type = priv->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
-	cfg.rx_filter = priv->rx_ts_enabled;
+	cfg.rx_filter = priv->rx_ts_enabled ? HWTSTAMP_FILTER_PTP_V2_EVENT :
+			HWTSTAMP_FILTER_NONE;
 
 	return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
 }
-- 
2.43.0