The driver stores the PCI resource address into 'unsigned long' variable before
calling ioremap() on it. This warrants a kernel oops when the registers are
accessed 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 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 [EMAIL PROTECTED]
---
Reposting the patch with the typecast, log, and summary corrected.
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/natsemi.c | 10 ++
1 files changed, 6 insertions(+), 4 deletions(-)
Index: linux-2.6/drivers/net/natsemi.c
===
--- linux-2.6.orig/drivers/net/natsemi.c
+++ linux-2.6/drivers/net/natsemi.c
@@ -786,7 +786,8 @@ static int __devinit natsemi_probe1 (str
struct netdev_private *np;
int i, option, irq, chip_idx = ent-driver_data;
static int find_cnt = -1;
- unsigned long iostart, iosize;
+ resource_size_t iostart;
+ unsigned long iosize;
void __iomem *ioaddr;
const int pcibar = 1; /* PCI base address register */
int prev_eedata;
@@ -946,10 +947,11 @@ static int __devinit natsemi_probe1 (str
goto err_create_file;
if (netif_msg_drv(np)) {
- printk(KERN_INFO natsemi %s: %s at %#08lx
+ printk(KERN_INFO natsemi %s: %s at %#08llx
(%s), %s, IRQ %d,
- dev-name, natsemi_pci_info[chip_idx].name, iostart,
- pci_name(np-pci_dev), print_mac(mac, dev-dev_addr),
irq);
+ dev-name, natsemi_pci_info[chip_idx].name,
+ (unsigned long long)iostart, pci_name(np-pci_dev),
+ print_mac(mac, dev-dev_addr), irq);
if (dev-if_port == PORT_TP)
printk(, port TP.\n);
else if (np-ignore_phy)
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