[PATCH net-next 5/7] net: freescale: ucc_geth: Simplify frame length check

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

The frame length check is configured when the phy interface is setup.
However, it's configured according to an internal flag that is always
false. So, just make so that we disable the relevant bit in the MACCFG2
register upon accessing it for other MAC configuration operations.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
 drivers/net/ethernet/freescale/ucc_geth.c | 21 +++------------------
 drivers/net/ethernet/freescale/ucc_geth.h |  1 -
 2 files changed, 3 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index 13b8f8401c81..052f06d6f312 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -1205,22 +1205,6 @@ static int init_mac_station_addr_regs(u8 address_byte_0,
 	return 0;
 }
 
-static int init_check_frame_length_mode(int length_check,
-					u32 __iomem *maccfg2_register)
-{
-	u32 value = 0;
-
-	value = in_be32(maccfg2_register);
-
-	if (length_check)
-		value |= MACCFG2_LC;
-	else
-		value &= ~MACCFG2_LC;
-
-	out_be32(maccfg2_register, value);
-	return 0;
-}
-
 static int init_preamble_length(u8 preamble_length,
 				u32 __iomem *maccfg2_register)
 {
@@ -1304,6 +1288,9 @@ static int adjust_enet_interface(struct ucc_geth_private *ugeth)
 
 	/*                    Set MACCFG2                    */
 	maccfg2 = in_be32(&ug_regs->maccfg2);
+
+	/* Disable frame length check */
+	maccfg2 &= ~MACCFG2_LC;
 	maccfg2 &= ~MACCFG2_INTERFACE_MODE_MASK;
 	if ((ugeth->max_speed == SPEED_10) ||
 	    (ugeth->max_speed == SPEED_100))
@@ -1365,8 +1352,6 @@ static int adjust_enet_interface(struct ucc_geth_private *ugeth)
 		put_device(&tbiphy->mdio.dev);
 	}
 
-	init_check_frame_length_mode(ug_info->lengthCheckRx, &ug_regs->maccfg2);
-
 	ret_val = init_preamble_length(ug_info->prel, &ug_regs->maccfg2);
 	if (ret_val != 0) {
 		if (netif_msg_probe(ugeth))
diff --git a/drivers/net/ethernet/freescale/ucc_geth.h b/drivers/net/ethernet/freescale/ucc_geth.h
index c08a56b7c9fe..11e490398f18 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.h
+++ b/drivers/net/ethernet/freescale/ucc_geth.h
@@ -1088,7 +1088,6 @@ struct ucc_geth_info {
 	u8 miminumInterFrameGapEnforcement;
 	u8 backToBackInterFrameGap;
 	int ipAddressAlignment;
-	int lengthCheckRx;
 	u32 mblinterval;
 	u16 nortsrbytetime;
 	u8 fracsiz;
-- 
2.47.0