diff options
| author | Thangaraj Samynathan <thangaraj.s@microchip.com> | 2026-03-23 12:23:45 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 13:25:29 +0200 |
| commit | 1aee92a5a464f476a7a3a4109c5c9f5415d602fe (patch) | |
| tree | 26259420f2b568826072b85cedef085b96492fc0 /drivers/net | |
| parent | d5827316debcb677679bb014885d7be92c410e11 (diff) | |
net: lan743x: fix duplex configuration in mac_link_up
[ Upstream commit 71399707876b93240f236f48b8062f3423a5fe97 ]
The driver does not explicitly configure the MAC duplex mode when
bringing the link up. As a result, the MAC may retain a stale duplex
setting from a previous link state, leading to duplex mismatches with
the link partner and degraded network performance.
Update lan743x_phylink_mac_link_up() to set or clear the MAC_CR_DPX_
bit according to the negotiated duplex mode.
This ensures the MAC configuration is consistent with the phylink
resolved state.
Fixes: a5f199a8d8a03 ("net: lan743x: Migrate phylib to phylink")
Signed-off-by: Thangaraj Samynathan <thangaraj.s@microchip.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20260323065345.144915-1-thangaraj.s@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan743x_main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index e4c542fc6c2b..09d255e78f6c 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -3054,6 +3054,11 @@ static void lan743x_phylink_mac_link_up(struct phylink_config *config, else if (speed == SPEED_100) mac_cr |= MAC_CR_CFG_L_; + if (duplex == DUPLEX_FULL) + mac_cr |= MAC_CR_DPX_; + else + mac_cr &= ~MAC_CR_DPX_; + lan743x_csr_write(adapter, MAC_CR, mac_cr); lan743x_ptp_update_latency(adapter, speed); |