[PATCH net-next 08/15] sfc: don't call tx_limit_len if NIC type doesn't have one

[Edward Cree]

EF100 doesn't need to split up large DMAs.

Signed-off-by: Edward Cree <ec...@solarflare.com>
---
 drivers/net/ethernet/sfc/tx_common.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/sfc/tx_common.c 
b/drivers/net/ethernet/sfc/tx_common.c
index 2a058b76d1f0..11b64c609550 100644
--- a/drivers/net/ethernet/sfc/tx_common.c
+++ b/drivers/net/ethernet/sfc/tx_common.c
@@ -298,7 +298,11 @@ struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue 
*tx_queue,
        /* Map the fragment taking account of NIC-dependent DMA limits. */
        do {
                buffer = efx_tx_queue_get_insert_buffer(tx_queue);
-               dma_len = nic_type->tx_limit_len(tx_queue, dma_addr, len);
+
+               if (nic_type->tx_limit_len)
+                       dma_len = nic_type->tx_limit_len(tx_queue, dma_addr, 
len);
+               else
+                       dma_len = len;
 
                buffer->len = dma_len;
                buffer->dma_addr = dma_addr;