[PATCH] sky2: bad memory reference on dual port cards

Sky2 driver will oops referencing bad memory if used on
a dual port card.  The problem is accessing past end of
MIB counter space.

Applies for both 2.6.17 and 2.6.16 (with fuzz)

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 3 insertions, 3 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 4272e47258df..67b0eab16589 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -577,8 +577,8 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
         reg = gma_read16(hw, port, GM_PHY_ADDR);
         gma_write16(hw, port, GM_PHY_ADDR, reg | GM_PAR_MIB_CLR);
 
-        for (i = 0; i < GM_MIB_CNT_SIZE; i++)
-                gma_read16(hw, port, GM_MIB_CNT_BASE + 8 * i);
+        for (i = GM_MIB_CNT_BASE; i <= GM_MIB_CNT_END; i += 4)
+                gma_read16(hw, port, i);
         gma_write16(hw, port, GM_PHY_ADDR, reg);
 
         /* transmit control */
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 62532b4e45c5..89dd18cd12f0 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1375,7 +1375,7 @@ enum {
         GM_PHY_ADDR     = 0x0088,       /* 16 bit r/w   GPHY Address Register */
 /* MIB Counters */
         GM_MIB_CNT_BASE = 0x0100,       /* Base Address of MIB Counters */
-        GM_MIB_CNT_SIZE = 256,
+        GM_MIB_CNT_END  = 0x025C,       /* Last MIB counter */
 };