bnx2: Adjust flow control water marks.

The current water marks are too high and can cause unnecessary flow
control frames.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 063f28394e3d..dbe487f2915d 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -1277,7 +1277,7 @@ bnx2_init_rx_context(struct bnx2 *bp, u32 cid)
                 if (lo_water >= bp->rx_ring_size)
                         lo_water = 0;
 
-                hi_water = bp->rx_ring_size / 4;
+                hi_water = min_t(int, bp->rx_ring_size / 4, lo_water + 16);
 
                 if (hi_water <= lo_water)
                         lo_water = 0;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index b860fbbff355..cd4b0e4637ab 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -349,7 +349,7 @@ struct l2_fhdr {
 #define BNX2_L2CTX_BD_PRE_READ                          0x00000000
 #define BNX2_L2CTX_CTX_SIZE                             0x00000000
 #define BNX2_L2CTX_CTX_TYPE                             0x00000000
-#define BNX2_L2CTX_LO_WATER_MARK_DEFAULT                 32
+#define BNX2_L2CTX_LO_WATER_MARK_DEFAULT                 4
 #define BNX2_L2CTX_LO_WATER_MARK_SCALE                   4
 #define BNX2_L2CTX_LO_WATER_MARK_DIS                     0
 #define BNX2_L2CTX_HI_WATER_MARK_SHIFT                   4