ixgbe: Do not decrement budget in ixgbe_clean_rx_irq

This change makes it so that compare the total_rx_packets cleaned to budget
instead of decrementing budget.  The advantage to this approach is that budget
can now be const and we only end up modifying total_rx_packets instead of
modifying both it and budget.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ceab142..a34ee7d 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1794,7 +1794,7 @@ dma_sync:
  **/
 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
                               struct ixgbe_ring *rx_ring,
-                              int budget)
+                              const int budget)
 {
        unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 #ifdef IXGBE_FCOE
@@ -1845,7 +1845,6 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
 
                /* probably a little skewed due to removing CRC */
                total_rx_bytes += skb->len;
-               total_rx_packets++;
 
                /* populate checksum, timestamp, VLAN, and protocol */
                ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
@@ -1878,8 +1877,8 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
                ixgbe_rx_skb(q_vector, skb);
 
                /* update budget accounting */
-               budget--;
-       } while (likely(budget));
+               total_rx_packets++;
+       } while (likely(total_rx_packets < budget));
 
        u64_stats_update_begin(&rx_ring->syncp);
        rx_ring->stats.packets += total_rx_packets;
@@ -1891,7 +1890,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
        if (cleaned_count)
                ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
 
-       return !!budget;
+       return (total_rx_packets < budget);
 }
 
 /**