bnx2x: Disable HC coalescing when setting timeout to zero.

Problem reported by Flavio Leitner <fleitner@redhat.com>:
When setting rx/tx coalescing timeout to the values less than 12 traffic was
stopped.

The FW supports coalescing in 12us granularity, and so value of less then 12
should be interpreted as disabling coalescing

Signed-off-by: Vlad Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 951714a7f90a8925b1ceb311500251299959cf11..5737b7519005db13cad424e6ca92835678bac013 100644 (file)
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -4434,7 +4434,7 @@ static void bnx2x_update_coalesce(struct bnx2x *bp)
                REG_WR16(bp, BAR_USTRORM_INTMEM +
                         USTORM_SB_HC_DISABLE_OFFSET(port, sb_id,
                                                     U_SB_ETH_RX_CQ_INDEX),
-                        bp->rx_ticks ? 0 : 1);
+                        (bp->rx_ticks/12) ? 0 : 1);
 
                /* HC_INDEX_C_ETH_TX_CQ_CONS */
                REG_WR8(bp, BAR_CSTRORM_INTMEM +
@@ -4444,7 +4444,7 @@ static void bnx2x_update_coalesce(struct bnx2x *bp)
                REG_WR16(bp, BAR_CSTRORM_INTMEM +
                         CSTORM_SB_HC_DISABLE_OFFSET(port, sb_id,
                                                     C_SB_ETH_TX_CQ_INDEX),
-                        bp->tx_ticks ? 0 : 1);
+                        (bp->tx_ticks/12) ? 0 : 1);
        }
 }