From: Sven Van Asbroeck <[email protected]>
This reverts commit 3e21a10fdea3c2e4e4d1b72cb9d720256461af40.
The reverted patch completely breaks all network connectivity on the
lan7430. tcpdump indicates missing bytes when receiving ping
packets from an external host:
host$ ping $lan7430_ip
lan7430$ tcpdump -v
IP truncated-ip - 2 bytes missing! (tos 0x0, ttl 64, id 21715,
offset 0, flags [DF], proto ICMP (1), length 84)
Fixes: 3e21a10fdea3 ("lan743x: trim all 4 bytes of the FCS; not just 2")
Signed-off-by: Sven Van Asbroeck <[email protected]>
---
To: Bryan Whitehead <[email protected]>
To: "David S. Miller" <[email protected]>
To: Jakub Kicinski <[email protected]>
To: George McCollister <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
drivers/net/ethernet/microchip/lan743x_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c
b/drivers/net/ethernet/microchip/lan743x_main.c
index 1c3e204d727c..dbdfabff3b00 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -2040,7 +2040,7 @@ lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
dev_kfree_skb_irq(skb);
return NULL;
}
- frame_length = max_t(int, 0, frame_length - RX_HEAD_PADDING - 4);
+ frame_length = max_t(int, 0, frame_length - RX_HEAD_PADDING - 2);
if (skb->len > frame_length) {
skb->tail -= skb->len - frame_length;
skb->len = frame_length;
--
2.17.1
