[PATCH 3.16 348/370] r8152: fix the sw rx checksum is unavailable

Ben Hutchings
2017-03-10T12:18:26Z

From: hayeswang <hayeswang@realtek.com>

[ Upstream commit 19c0f40d4fca3a47b8f784a627f0467f0138ccc8 ]

Fix the hw rx checksum is always enabled, and the user couldn't switch
it to sw rx checksum.

Note that the RTL_VER_01 only support sw rx checksum only. Besides,
the hw rx checksum for RTL_VER_02 is disabled after
commit b9a321b48af4 ("r8152: Fix broken RX checksums."). Re-enable it.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/usb/r8152.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1596,7 +1596,7 @@ static u8 r8152_rx_csum(struct r8152 *tp
u8 checksum = CHECKSUM_NONE;
u32 opts2, opts3;

- if (tp->version == RTL_VER_01)
+ if (!(tp->netdev->features & NETIF_F_RXCSUM))
goto return_result;

opts2 = le32_to_cpu(rx_desc->opts2);
@@ -3454,6 +3454,11 @@ static int rtl8152_probe(struct usb_inte
NETIF_F_TSO | NETIF_F_FRAGLIST |
NETIF_F_IPV6_CSUM | NETIF_F_TSO6;

+ if (tp->version == RTL_VER_01) {
+ netdev->features &= ~NETIF_F_RXCSUM;
+ netdev->hw_features &= ~NETIF_F_RXCSUM;
+ }
+
netdev->ethtool_ops = &ops;
netif_set_gso_max_size(netdev, RTL_LIMITED_TSO_SIZE);