sky2: reduce default transmit ring

Reduce the size of the driver transmit ring to reduce latency
and allow qdisc to do better rate control.  Also make it
obvious what the minimum transmit ring allowed is and why.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 1b8de4518adc..6e95d2f54106 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -65,9 +65,9 @@
 #define RX_DEF_PENDING          RX_MAX_PENDING
 
 #define TX_RING_SIZE            512
-#define TX_DEF_PENDING          (TX_RING_SIZE - 1)
-#define TX_MIN_PENDING          64
+#define TX_DEF_PENDING          128
 #define MAX_SKB_TX_LE           (4 + (sizeof(dma_addr_t)/sizeof(u32))*MAX_SKB_FRAGS)
+#define TX_MIN_PENDING          (MAX_SKB_TX_LE+1)
 
 #define STATUS_RING_SIZE        2048    /* 2 ports * (TX + 2*RX) */
 #define STATUS_LE_BYTES         (STATUS_RING_SIZE*sizeof(struct sky2_status_le))