kernel: mtk_sgmii: re-organize PCS link status reporting

Don't report speed in case link is down.

Signed-off-by: Daniel Golle <[email protected]>

target/linux/generic/pending-5.15/724-net-mtk_sgmii-implement-mtk_pcs_ops.patch

@@ -15,7 +15,7 @@ Signed-off-by: Daniel Golle <[email protected]>
 
 --- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
 +++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
-@@ -122,10 +122,26 @@ static void mtk_pcs_link_up(struct phyli
+@@ -122,10 +122,28 @@ static void mtk_pcs_link_up(struct phyli
  	regmap_write(mpcs->regmap, SGMSYS_SGMII_MODE, val);
  }
  
@@ -24,12 +24,14 @@ Signed-off-by: Daniel Golle <[email protected]>
 +	struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
 +	unsigned int val;
 +
-+	regmap_read(mpcs->regmap, mpcs->ana_rgc3, &val);
-+	state->speed = val & RG_PHY_SPEED_3_125G ? SPEED_2500 : SPEED_1000;
-+
 +	regmap_read(mpcs->regmap, SGMSYS_PCS_CONTROL_1, &val);
 +	state->an_complete = !!(val & SGMII_AN_COMPLETE);
 +	state->link = !!(val & SGMII_LINK_STATYS);
++	if (!state->link)
++		return;
++
++	regmap_read(mpcs->regmap, mpcs->ana_rgc3, &val);
++	state->speed = val & RG_PHY_SPEED_3_125G ? SPEED_2500 : SPEED_1000;
 +	state->duplex = DUPLEX_FULL;
 +	state->pause = 0;
 +}