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authorhayeswang <hayeswang@realtek.com>2017-03-20 16:13:44 +0800
committerDavid S. Miller <davem@davemloft.net>2017-03-22 10:50:36 -0700
commit210c4f70b4c630b27f0840c8043c138c955edc9e (patch)
treeb23b516abc1df33c1e2578b5b379d7b9781f2ccd /drivers/net/usb
parenta05d4fd9176003e0c1f9c3d083f4dac19fd346ab (diff)
downloadlinux-210c4f70b4c630b27f0840c8043c138c955edc9e.tar.bz2
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: Hayes Wang <hayeswang@realtek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb')
-rw-r--r--drivers/net/usb/r8152.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index bb3eedd07fbe..525c25817013 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -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))
- r8153_set_rx_early_size(tp);
+ 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);