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| author | David John <davidjon@xenontk.org> | 2010-01-04 20:28:57 +0530 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-01-04 15:10:56 -0800 |
| commit | 6be954d1f91b81ca85c74792b13654069278c577 (patch) | |
| tree | c1e769d05028d8b8dc2058b10e7d0be01a9b2be5 /drivers/pci | |
| parent | 46256f83d0d066f99ffde547f27473dfd2a78009 (diff) | |
| download | linux-6be954d1f91b81ca85c74792b13654069278c577.tar.bz2 | |
PCI: Check the node argument passed to cpumask_of_node
Commit e0cd516 "PCI: derive nearby CPUs from device's instead of bus'
NUMA information" causes an null pointer dereference when reading from
the sysfs attributes local_cpu* on Intel machines with no ACPI NUMA
proximity info, since dev->numa_node gets set to -1 for all PCI devices,
which then gets passed to cpumask_of_node.
Add a check to prevent this.
Signed-off-by: David John <davidjon@xenontk.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index c5df94e86678..807224ec8351 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -75,7 +75,8 @@ static ssize_t local_cpus_show(struct device *dev, int len; #ifdef CONFIG_NUMA - mask = cpumask_of_node(dev_to_node(dev)); + mask = (dev_to_node(dev) == -1) ? cpu_online_mask : + cpumask_of_node(dev_to_node(dev)); #else mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); #endif @@ -93,7 +94,8 @@ static ssize_t local_cpulist_show(struct device *dev, int len; #ifdef CONFIG_NUMA - mask = cpumask_of_node(dev_to_node(dev)); + mask = (dev_to_node(dev) == -1) ? cpu_online_mask : + cpumask_of_node(dev_to_node(dev)); #else mask = cpumask_of_pcibus(to_pci_dev(dev)->bus); #endif |