[patch 15/23] x86/ioapic: Add proper checks to setp/enable_IO_APIC()

[Thomas Gleixner <tglx@linutronix.de>]

[-- Attachment #1: x86-ioapic-add-proper-checks.patch --]
[-- Type: text/plain, Size: 1050 bytes --]

No point to have the same checks at every call site. Add them to the
functions, so they can be called unconditionally.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/kernel/apic/io_apic.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

Index: tip/arch/x86/kernel/apic/io_apic.c
===================================================================
--- tip.orig/arch/x86/kernel/apic/io_apic.c
+++ tip/arch/x86/kernel/apic/io_apic.c
@@ -1507,7 +1507,10 @@ void __init enable_IO_APIC(void)
 	int i8259_apic, i8259_pin;
 	int apic, pin;
 
-	if (!nr_legacy_irqs())
+	if (skip_ioapic_setup)
+		nr_ioapics = 0;
+
+	if (!nr_legacy_irqs() || !nr_ioapics)
 		return;
 
 	for_each_ioapic_pin(apic, pin) {
@@ -2373,9 +2376,9 @@ void __init setup_IO_APIC(void)
 {
 	int ioapic;
 
-	/*
-	 * calling enable_IO_APIC() is moved to setup_local_APIC for BP
-	 */
+	if (skip_ioapic_setup || !nr_ioapics)
+		return;
+
 	io_apic_irqs = nr_legacy_irqs() ? ~PIC_IRQS : ~0UL;
 
 	apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");