From: Mirko Lindner <mlindner@marvell.com>
To: "davem@davemloft.net" <davem@davemloft.net>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Stephen Hemminger <shemminger@vyatta.com>
Subject: [PATCH 2/2] sky2: Threshold for Pause Packet is set wrong
Date: Tue, 26 Mar 2013 17:38:42 +0100 [thread overview]
Message-ID: <1567731.Oea6BC09CI@mlindner-lin> (raw)
The sky2 driver sets the Rx Upper Threshold for Pause Packet generation to a
wrong value which leads to only 2kB of RAM remaining space. This can lead to
Rx overflow errors even with activated flow-control.
Fix: We should increase the value to 8192/8
Signed-off-by: Mirko Lindner <mlindner@marvell.com>
---
drivers/net/ethernet/marvell/sky2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index fc07ca3..6a0e671 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1067,7 +1067,7 @@ static void sky2_ramset(struct sky2_hw *hw, u16 q, u32 start, u32 space)
sky2_write32(hw, RB_ADDR(q, RB_RX_UTHP), tp);
sky2_write32(hw, RB_ADDR(q, RB_RX_LTHP), space/2);
- tp = space - 2048/8;
+ tp = space - 8192/8;
sky2_write32(hw, RB_ADDR(q, RB_RX_UTPP), tp);
sky2_write32(hw, RB_ADDR(q, RB_RX_LTPP), space/4);
} else {
--
1.7.10.4
reply other threads:[~2013-03-26 16:41 UTC|newest]
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