X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fppc64%2Fkernel%2Fi8259.c;h=9bea66770ab07bb411f85b4c3e636b2d9527bc12;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=2f2b9bf8cf1cd4b4cbfc57cf0c9d858d55bea443;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git

diff --git a/arch/ppc64/kernel/i8259.c b/arch/ppc64/kernel/i8259.c
index 2f2b9bf8c..9bea66770 100644
--- a/arch/ppc64/kernel/i8259.c
+++ b/arch/ppc64/kernel/i8259.c
@@ -21,9 +21,10 @@ unsigned char cached_8259[2] = { 0xff, 0xff };
 #define cached_A1 (cached_8259[0])
 #define cached_21 (cached_8259[1])
 
-static spinlock_t i8259_lock __cacheline_aligned_in_smp = SPIN_LOCK_UNLOCKED;
+static  __cacheline_aligned_in_smp DEFINE_SPINLOCK(i8259_lock);
 
-int i8259_pic_irq_offset;
+static int i8259_pic_irq_offset;
+static int i8259_present;
 
 int i8259_irq(int cpu)
 {
@@ -140,11 +141,13 @@ struct hw_interrupt_type i8259_pic = {
         NULL
 };
 
-void __init i8259_init(void)
+void __init i8259_init(int offset)
 {
 	unsigned long flags;
 	
 	spin_lock_irqsave(&i8259_lock, flags);
+	i8259_pic_irq_offset = offset;
+	i8259_present = 1;
         /* init master interrupt controller */
         outb(0x11, 0x20); /* Start init sequence */
         outb(0x00, 0x21); /* Vector base */
@@ -160,7 +163,18 @@ void __init i8259_init(void)
         outb(cached_A1, 0xA1);
         outb(cached_21, 0x21);
 	spin_unlock_irqrestore(&i8259_lock, flags);
+        
+}
+
+static int i8259_request_cascade(void)
+{
+	if (!i8259_present)
+		return -ENODEV;
+
         request_irq( i8259_pic_irq_offset + 2, no_action, SA_INTERRUPT,
                      "82c59 secondary cascade", NULL );
-        
+
+	return 0;
 }
+
+arch_initcall(i8259_request_cascade);