netdev - [PATCH 1/2] bnx2x: Disable HC coalescing when setting timeout to zero.

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Date:	Sun, 5 Jul 2009 17:18:12 +0300
From:	"Eilon Greenstein" <eilong@...adcom.com>
To:	"David S. Miller" <davem@...emloft.net>
cc:	"Linux Netdev List" <netdev@...r.kernel.org>,
	"Vladislav Zolotarov" <vladz@...adcom.com>,
	"Flavio Leitner" <fleitner@...hat.com>
Subject: [PATCH 1/2] bnx2x: Disable HC coalescing when setting timeout
 to zero.

Problem reported by Flavio Leitner <fleitner@...hat.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@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
 drivers/net/bnx2x_main.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 951714a..5737b75 100644
--- 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);
 	}
 }

--
1.6.0.4




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