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Commit 210c4f70 authored by hayeswang's avatar hayeswang Committed by David S. Miller
Browse files

r8152: set the RMS of RTL8153 according to the mtu 



Set the received maximum size (RMS) according to the mtu size. It is
unnecessary to receive a packet which is more than the size we could
transmit. Besides, this could let the rx buffer be used effectively.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a05d4fd9

drivers/net/usb/r8152.c

+12 −4
Original line number Diff line number Diff line
@@ -2899,7 +2899,8 @@ static void r8153_first_init(struct r8152 *tp) 


	rtl_rx_vlan_en(tp, tp->netdev->features & NETIF_F_HW_VLAN_CTAG_RX);



	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, RTL8153_RMS);

	ocp_data = tp->netdev->mtu + VLAN_ETH_HLEN + CRC_SIZE;

	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, ocp_data);

	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_MTPS, MTPS_JUMBO);



	ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR0);
@@ -2951,7 +2952,8 @@ static void r8153_enter_oob(struct r8152 *tp) 
		usleep_range(1000, 2000);

	}



	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, RTL8153_RMS);

	ocp_data = tp->netdev->mtu + VLAN_ETH_HLEN + CRC_SIZE;

	ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, ocp_data);



	ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_TEREDO_CFG);

	ocp_data &= ~TEREDO_WAKE_MASK;
@@ -4201,8 +4203,14 @@ static int rtl8152_change_mtu(struct net_device *dev, int new_mtu) 


	dev->mtu = new_mtu;



	if (netif_running(dev) && netif_carrier_ok(dev))

	if (netif_running(dev)) {

		u32 rms = new_mtu + VLAN_ETH_HLEN + CRC_SIZE;



		ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, rms);



		if (netif_carrier_ok(dev))

			r8153_set_rx_early_size(tp);

	}



	mutex_unlock(&tp->control);