1 files changed, 19 insertions, 14 deletions

diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index b2fb3c18d06b..b483deed311c 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -16,22 +16,20 @@ static int irqfixup __read_mostly;
 /*
  * Recovery handler for misrouted interrupts.
  */
-
 static int misrouted_irq(int irq, struct pt_regs *regs)
 {
         int i;
-        irq_desc_t *desc;
         int ok = 0;
         int work = 0;   /* Did we do work for a real IRQ */
 
-        for(i = 1; i < NR_IRQS; i++) {
+        for (i = 1; i < NR_IRQS; i++) {
+                struct irq_desc *desc = irq_desc + i;
                 struct irqaction *action;
 
                 if (i == irq)   /* Already tried */
                         continue;
-                desc = &irq_desc[i];
+
                 spin_lock(&desc->lock);
-                action = desc->action;
                 /* Already running on another processor */
                 if (desc->status & IRQ_INPROGRESS) {
                         /*
@@ -45,7 +43,9 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
                 }
                 /* Honour the normal IRQ locking */
                 desc->status |= IRQ_INPROGRESS;
+                action = desc->action;
                 spin_unlock(&desc->lock);
+
                 while (action) {
                         /* Only shared IRQ handlers are safe to call */
                         if (action->flags & SA_SHIRQ) {
@@ -62,9 +62,8 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
 
                 /*
                  * While we were looking for a fixup someone queued a real
-                 * IRQ clashing with our walk
+                 * IRQ clashing with our walk:
                  */
-
                 while ((desc->status & IRQ_PENDING) && action) {
                         /*
                          * Perform real IRQ processing for the IRQ we deferred
@@ -80,8 +79,8 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
                  * If we did actual work for the real IRQ line we must let the
                  * IRQ controller clean up too
                  */
-                if(work)
-                        desc->handler->end(i);
+                if (work && desc->chip && desc->chip->end)
+                        desc->chip->end(i);
                 spin_unlock(&desc->lock);
         }
         /* So the caller can adjust the irq error counts */
@@ -100,7 +99,8 @@ static int misrouted_irq(int irq, struct pt_regs *regs)
  */
 
 static void
-__report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
+__report_bad_irq(unsigned int irq, struct irq_desc *desc,
+                 irqreturn_t action_ret)
 {
         struct irqaction *action;
 
@@ -113,6 +113,7 @@ __report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
         }
         dump_stack();
         printk(KERN_ERR "handlers:\n");
+
         action = desc->action;
         while (action) {
                 printk(KERN_ERR "[<%p>]", action->handler);
@@ -123,7 +124,8 @@ __report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
         }
 }
 
-static void report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret)
+static void
+report_bad_irq(unsigned int irq, struct irq_desc *desc, irqreturn_t action_ret)
 {
         static int count = 100;
 
@@ -133,8 +135,8 @@ static void report_bad_irq(unsigned int irq, irq_desc_t *desc, irqreturn_t actio
         }
 }
 
-void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
-                        struct pt_regs *regs)
+void note_interrupt(unsigned int irq, struct irq_desc *desc,
+                    irqreturn_t action_ret, struct pt_regs *regs)
 {
         if (unlikely(action_ret != IRQ_HANDLED)) {
                 desc->irqs_unhandled++;
@@ -166,7 +168,8 @@ void note_interrupt(unsigned int irq, irq_desc_t *desc, irqreturn_t action_ret,
                  */
                 printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
                 desc->status |= IRQ_DISABLED;
-                desc->handler->disable(irq);
+                desc->depth = 1;
+                desc->chip->disable(irq);
         }
         desc->irqs_unhandled = 0;
 }
@@ -177,6 +180,7 @@ int __init noirqdebug_setup(char *str)
 {
         noirqdebug = 1;
         printk(KERN_INFO "IRQ lockup detection disabled\n");
+
         return 1;
 }
 
@@ -187,6 +191,7 @@ static int __init irqfixup_setup(char *str)
         irqfixup = 1;
         printk(KERN_WARNING "Misrouted IRQ fixup support enabled.\n");
         printk(KERN_WARNING "This may impact system performance.\n");
+
         return 1;
 }