From bcfef8c3681fa59b653871682956a8fdf5c27c5a Mon Sep 17 00:00:00 2001
From: Jesper Juhl <jesper.juhl@gmail.com>
Date: Fri, 28 Sep 2007 22:42:09 -0700
Subject: [PATCH] Avoid possible NULL pointer deref in 3c359 driver
In xl_freemem(), if dev_if is NULL, the line
struct xl_private *xl_priv =(struct xl_private *)dev->priv;
will cause a NULL pointer dereference.
(akpm: don't try to fix it: just delete the pointless test-for-null)
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
drivers/net/tokenring/3c359.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/net/tokenring/3c359.c b/drivers/net/tokenring/3c359.c
index 88d03c085d54..7224d368b2a7 100644
--- a/drivers/net/tokenring/3c359.c
+++ b/drivers/net/tokenring/3c359.c
@@ -1045,11 +1045,6 @@ static irqreturn_t xl_interrupt(int irq, void *dev_id)
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
u16 intstatus, macstatus ;
- if (!dev) {
- printk(KERN_WARNING "Device structure dead, aaahhhh !\n") ;
- return IRQ_NONE;
- }
-
intstatus = readw(xl_mmio + MMIO_INTSTATUS) ;
if (!(intstatus & 1)) /* We didn't generate the interrupt */
--
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