sky2: Threshold for Pause Packet is set wrong

[ 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 <mlindner@marvell.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index 3269eb38cc576924a958354b9e664b1a92b26dd2..d23dc5efcbe8dbe22e0613223c26f026110baf6d 100644 (file)
--- 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 {