ibmveth: Remove integer divide caused by modulus

Replace some modulus operators with an increment and compare to avoid
an integer divide.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index 4734c939ad03..d2cc6d3f401c 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -252,7 +252,9 @@ static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struc
                 }
 
                 free_index = pool->consumer_index;
-                pool->consumer_index = (pool->consumer_index + 1) % pool->size;
+                pool->consumer_index++;
+                if (pool->consumer_index >= pool->size)
+                        pool->consumer_index = 0;
                 index = pool->free_map[free_index];
 
                 ibmveth_assert(index != IBM_VETH_INVALID_MAP);
@@ -377,9 +379,10 @@ static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64
                          DMA_FROM_DEVICE);
 
         free_index = adapter->rx_buff_pool[pool].producer_index;
-        adapter->rx_buff_pool[pool].producer_index
-                = (adapter->rx_buff_pool[pool].producer_index + 1)
-                % adapter->rx_buff_pool[pool].size;
+        adapter->rx_buff_pool[pool].producer_index++;
+        if (adapter->rx_buff_pool[pool].producer_index >=
+            adapter->rx_buff_pool[pool].size)
+                adapter->rx_buff_pool[pool].producer_index = 0;
         adapter->rx_buff_pool[pool].free_map[free_index] = index;
 
         mb();