[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>
mariux64 · Apr 12, 2006 · 43f2f10 · 43f2f10
1 parent 9484356
commit 43f2f10
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git 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
@@ -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 */
 };