From b8fa2f3a82069304acac1f9e957d491585f4f49a Mon Sep 17 00:00:00 2001
From: Michael Chan <mchan@broadcom.com>
Date: Fri, 6 Apr 2007 17:35:37 -0700
Subject: [PATCH] [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>
---
drivers/net/tg3.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 0acee9f324e92a..256969e1300c9f 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);
--
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