2013-04-11 21:20:58

by Steven Rostedt

[permalink] [raw]
Subject: [ 148/171 ] sky2: Threshold for Pause Packet is set wrong stable review patch.
If anyone has any objections, please let me know.


From: Mirko Lindner <[email protected]>

[ Upstream commit 74f9f42c1c1650e74fb464f76644c9041f996851 ]

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 <[email protected]>
Acked-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
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 2b0748d..c8d7e5f 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 {