netdev - [PATCH] tg3: fix for PPC 44x platforms

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Date:	Tue, 8 Apr 2008 23:33:26 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	jgarzik@...ox.com
Cc:	netdev@...r.kernel.org, linuxppc-dev@...abs.org
Subject: [PATCH] tg3: fix for PPC 44x platforms

The driver stores the the PCI resource addresses into 'unsigned long' variable
before calling ioremap() on them. This warrants kernel oops when the registers
are accesse on PPC 44x platforms which (being 32-bit) have PCI memory space
mapped beyond 4 GB.

The arch/ppc/ kernel has a fixup in ioremap() that creates an illusion of the
PCI I/O and memory resources are mapped below 4 GB, but arch/powerpc/ code got
rid of this trick, having instead CONFIG_RESOURCES_64BIT enabled.

Signed-off-by: Sergei Shtylyov <sshtylyov@...mvista.com>

---
This is the same issue as the one that has been recently addressed by commits
3c34ac36ac1084e571ef9b6fb1d6a5b10ccc1fd0 (e1000: Fix for 32 bits platforms with
64 bits resources) and c976816b6e901341ec3c4653147316c15549a1c4 (siimage: fix
kernel oops on PPC 44x).  The patch has only been compile tested though...

 drivers/net/tg3.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/net/tg3.c
===================================================================
--- linux-2.6.orig/drivers/net/tg3.c
+++ linux-2.6/drivers/net/tg3.c
@@ -12578,7 +12578,8 @@ static int __devinit tg3_init_one(struct
 				  const struct pci_device_id *ent)
 {
 	static int tg3_version_printed = 0;
-	unsigned long tg3reg_base, tg3reg_len;
+	resource_size_t tg3reg_base;
+	unsigned long tg3reg_len;
 	struct net_device *dev;
 	struct tg3 *tp;
 	int err, pm_cap;

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