sfc: Remove bogus comment about MTU change and RX buffer overrun

RX DMA is limited by the length specified in each descriptor and not
by the MAC.  Over-length frames may get into the RX FIFO regardless of
the MAC settings, due to a hardware bug, but they will be truncated by
the packet DMA engine and reported as such in the completion event.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index b29db12756f9c49f2dec41aa1e3d7b467c4273da..4105a66647651ca615c82d2393609ff46cf452fa 100644 (file)
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1953,8 +1953,6 @@ static int efx_change_mtu(struct net_device *net_dev, int new_mtu)
        netif_dbg(efx, drv, efx->net_dev, "changing MTU to %d\n", new_mtu);
 
        mutex_lock(&efx->mac_lock);
-       /* Reconfigure the MAC before enabling the dma queues so that
-        * the RX buffers don't overflow */
        net_dev->mtu = new_mtu;
        efx->type->reconfigure_mac(efx);
        mutex_unlock(&efx->mac_lock);