Message ID | 1421720467-7709-4-git-send-email-jiang.liu@linux.intel.com |
---|---|
State | Not Applicable |
Headers | show |
On 20/01/15 02:21, Jiang Liu wrote: > Xen overrides __acpi_register_gsi and leaves __acpi_unregister_gsi as is. > That means, an IRQ allocated by acpi_register_gsi_xen_hvm() or > acpi_register_gsi_xen() will be freed by acpi_unregister_gsi_ioapic(), > which may cause undesired effects. So override __acpi_unregister_gsi to > NULL for safety. Reviewed-by: David Vrabel <david.vrabel@citrix.com> Thanks. David -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h index 0ab4f9fd2687..3a45668f6dc3 100644 --- a/arch/x86/include/asm/acpi.h +++ b/arch/x86/include/asm/acpi.h @@ -50,6 +50,7 @@ void acpi_pic_sci_set_trigger(unsigned int, u16); extern int (*__acpi_register_gsi)(struct device *dev, u32 gsi, int trigger, int polarity); +extern void (*__acpi_unregister_gsi)(u32 gsi); static inline void disable_acpi(void) { diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 6e5e89c3c644..9098d880c476 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -458,6 +458,7 @@ int __init pci_xen_hvm_init(void) * just how GSIs get registered. */ __acpi_register_gsi = acpi_register_gsi_xen_hvm; + __acpi_unregister_gsi = NULL; #endif #ifdef CONFIG_PCI_MSI @@ -482,6 +483,7 @@ int __init pci_xen_initial_domain(void) pci_msi_ignore_mask = 1; #endif __acpi_register_gsi = acpi_register_gsi_xen; + __acpi_unregister_gsi = NULL; /* Pre-allocate legacy irqs */ for (irq = 0; irq < nr_legacy_irqs(); irq++) { int trigger, polarity;