From: Michael Chan <mchan@broadcom.com>
Date: Sat, 7 Apr 2007 00:35:37 +0000 (-0700)
Subject: [TG3]: Fix crash during tg3_init_one().
X-Git-Tag: v2.6.21-rc7~44^2
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=b8fa2f3a82069304acac1f9e957d491585f4f49a;p=linux-2.6-omap-h63xx.git

[TG3]: Fix crash during tg3_init_one().

The driver will crash when the chip has been initialized by EFI before
tg3_init_one().  In this case, the driver will call tg3_chip_reset()
before allocating consistent memory.

The bug is fixed by checking for tp->hw_status before accessing it
during tg3_chip_reset().

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 0acee9f324e..256969e1300 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4834,8 +4834,10 @@ static int tg3_chip_reset(struct tg3 *tp)
 	 * sharing or irqpoll.
 	 */
 	tp->tg3_flags |= TG3_FLAG_CHIP_RESETTING;
-	tp->hw_status->status = 0;
-	tp->hw_status->status_tag = 0;
+	if (tp->hw_status) {
+		tp->hw_status->status = 0;
+		tp->hw_status->status_tag = 0;
+	}
 	tp->last_tag = 0;
 	smp_mb();
 	synchronize_irq(tp->pdev->irq);