sfc: Fix reading of inserted hash

The hash appears immediately before the packet data, not at the
beginning of the buffer. This means we can easily use negative offsets
from the start of packet data, so adjust the data and length at the
top of __efx_rx_packet() instead of wherever we consume the hash.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/drivers/net/sfc/selftest.c b/drivers/net/sfc/selftest.c
index 0399be21c122..85f015f005d5 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -258,9 +258,6 @@ void efx_loopback_rx_packet(struct efx_nic *efx,
 
         payload = &state->payload;
 
-        buf_ptr += efx->type->rx_buffer_hash_size;
-        pkt_len -= efx->type->rx_buffer_hash_size;
-
         received = (struct efx_loopback_payload *) buf_ptr;
         received->ip.saddr = payload->ip.saddr;
         if (state->offload_csum)