@@ -1119,6 +1119,8 @@ static const struct dmi_system_id pciirq_dmi_table[] __initconst = {
void __init pcibios_irq_init(void)
{
+ struct irq_routing_table *rtable = NULL;
+
DBG(KERN_DEBUG "PCI: IRQ init\n");
if (raw_pci_ops == NULL)
@@ -1129,8 +1131,10 @@ void __init pcibios_irq_init(void)
pirq_table = pirq_find_routing_table();
#ifdef CONFIG_PCI_BIOS
- if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN))
+ if (!pirq_table && (pci_probe & PCI_BIOS_IRQ_SCAN)) {
pirq_table = pcibios_get_irq_routing_table();
+ rtable = pirq_table;
+ }
#endif
if (pirq_table) {
pirq_peer_trick();
@@ -1145,8 +1149,10 @@ void __init pcibios_irq_init(void)
* If we're using the I/O APIC, avoid using the PCI IRQ
* routing table
*/
- if (io_apic_assign_pci_irqs)
+ if (io_apic_assign_pci_irqs) {
+ kfree(rtable);
pirq_table = NULL;
+ }
}
x86_init.pci.fixup_irqs();
In pcibios_irq_init(), the PCI IRQ routing table 'pirq_table' is firstly found through pirq_find_routing_table(). If the table is not found and 'CONFIG_PCI_BIOS' is defined, the table is then allocated in pcibios_get_irq_routing_table() using kmalloc(). In the following execution, if the I/O APIC is used, this table is actually not used. However, in that case, the allocated table is not freed, which is a memory leak bug. To fix this issue, free the allocated table if it is not used. Signed-off-by: Wenwen Wang <wang6495@umn.edu> --- arch/x86/pci/irq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)