[PATCH net-next 1/3] net: cpsw: return proper RX timestamping filter in cpsw_hwtstamp_get()

[Vladimir Oltean]

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@xxxxxxx>
---
 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