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[IA64] fix kmalloc(0) in arch/ia64/pci/pci.c 

Hiroyuki Kamezawa reported the problem that pci_acpi_scan_root() of
ia64 might call kmalloc_node() with zero size.

Currently ia64's pci_acpi_scan_root() assumes that _CRS method of root
bridge has at least one resource window. But, the root bridges that
has no resource window must be taken into account.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Kenji Kaneshige 2007-05-22 10:20:36 -07:00 committed by Tony Luck
parent 6ae384884d
commit a66aa704d6
1 changed files with 7 additions and 4 deletions
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11
arch/ia64/pci/pci.c
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@ -354,10 +354,13 @@ pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&windows);
controller->window = kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
if (!controller->window)
goto out2;
if (windows) {
controller->window =
kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
if (!controller->window)
goto out2;
}
name = kmalloc(16, GFP_KERNEL);
if (!name)