4.9-stable review patch. If anyone has any objections, please let me know.
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From: Rob Taglang rob@taglang.io
[ Upstream commit 14224923c3600bae2ac4dcae3bf0c3d4dc2812be ]
Currently, skb->len and skb->data_len are set to the page size, not the packet size. This causes the frame check sequence to not be located at the "end" of the packet resulting in ethernet frame check errors. The driver does work currently, but stricter kernel facing networking solutions like OpenVSwitch will drop these packets as invalid.
These changes set the packet size correctly so that these errors no longer occur. The length does not include the frame check sequence, so that subtraction was removed.
Tested on Oracle/SUN Multithreaded 10-Gigabit Ethernet Network Controller [108e:abcd] and validated in wireshark.
Signed-off-by: Rob Taglang rob@taglang.io Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/sun/niu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -3442,7 +3442,7 @@ static int niu_process_rx_pkt(struct nap
len = (val & RCR_ENTRY_L2_LEN) >> RCR_ENTRY_L2_LEN_SHIFT; - len -= ETH_FCS_LEN; + append_size = len + ETH_HLEN + ETH_FCS_LEN;
addr = (val & RCR_ENTRY_PKT_BUF_ADDR) << RCR_ENTRY_PKT_BUF_ADDR_SHIFT; @@ -3452,7 +3452,6 @@ static int niu_process_rx_pkt(struct nap RCR_ENTRY_PKTBUFSZ_SHIFT];
off = addr & ~PAGE_MASK; - append_size = rcr_size; if (num_rcr == 1) { int ptype;
@@ -3465,7 +3464,7 @@ static int niu_process_rx_pkt(struct nap else skb_checksum_none_assert(skb); } else if (!(val & RCR_ENTRY_MULTI)) - append_size = len - skb->len; + append_size = append_size - skb->len;
niu_rx_skb_append(skb, page, off, append_size, rcr_size); if ((page->index + rp->rbr_block_size) - rcr_size == addr) {