[PATCH net] net: stmmac: dwmac4: fix PCS duplex mode decode

[Russell King (Oracle)]

dwmac4 was decoding the duplex mode from the GMAC_PHYIF_CONTROL_STATUS
register incorrectly, using GMAC_PHYIF_CTRLSTATUS_LNKMOD_MASK (value 1)
rather than GMAC_PHYIF_CTRLSTATUS_LNKMOD (bit 16). Fix this.

Thanks to Abhishek Chauhan for providing a response on this issue.

Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index b25774d69195..26d837554a2d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -791,7 +791,7 @@ static void dwmac4_phystatus(void __iomem *ioaddr, struct stmmac_extra_stats *x)
 		else
 			x->pcs_speed = SPEED_10;
 
-		x->pcs_duplex = (status & GMAC_PHYIF_CTRLSTATUS_LNKMOD_MASK);
+		x->pcs_duplex = (status & GMAC_PHYIF_CTRLSTATUS_LNKMOD);
 
 		pr_info("Link is Up - %d/%s\n", (int)x->pcs_speed,
 			x->pcs_duplex ? "Full" : "Half");
-- 
2.30.2