genirq: Use irq_get/put functions

Convert the management functions to use the common irq_get/put
function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 31 insertions, 50 deletions

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 99395a24f432..6cca1956c503 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -172,16 +172,13 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *mask)
 
 int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
+        struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
         if (!desc)
                 return -EINVAL;
-
-        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->affinity_hint = m;
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+        irq_put_desc_unlock(desc, flags);
         return 0;
 }
 EXPORT_SYMBOL_GPL(irq_set_affinity_hint);
@@ -336,6 +333,18 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
                 irq_disable(desc);
 }
 
+static int __disable_irq_nosync(unsigned int irq)
+{
+        unsigned long flags;
+        struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+
+        if (!desc)
+                return -EINVAL;
+        __disable_irq(desc, irq, false);
+        irq_put_desc_busunlock(desc, flags);
+        return 0;
+}
+
 /**
  *      disable_irq_nosync - disable an irq without waiting
  *      @irq: Interrupt to disable
@@ -349,17 +358,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
  */
 void disable_irq_nosync(unsigned int irq)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
-        unsigned long flags;
-
-        if (!desc)
-                return;
-
-        chip_bus_lock(desc);
-        raw_spin_lock_irqsave(&desc->lock, flags);
-        __disable_irq(desc, irq, false);
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-        chip_bus_sync_unlock(desc);
+        __disable_irq_nosync(irq);
 }
 EXPORT_SYMBOL(disable_irq_nosync);
 
@@ -377,13 +376,7 @@ EXPORT_SYMBOL(disable_irq_nosync);
  */
 void disable_irq(unsigned int irq)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
-
-        if (!desc)
-                return;
-
-        disable_irq_nosync(irq);
-        if (desc->action)
+        if (!__disable_irq_nosync(irq))
                 synchronize_irq(irq);
 }
 EXPORT_SYMBOL(disable_irq);
@@ -434,21 +427,18 @@ void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume)
  */
 void enable_irq(unsigned int irq)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
+        struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
 
         if (!desc)
                 return;
-
         if (WARN(!desc->irq_data.chip,
                  KERN_ERR "enable_irq before setup/request_irq: irq %u\n", irq))
-                return;
+                goto out;
 
-        chip_bus_lock(desc);
-        raw_spin_lock_irqsave(&desc->lock, flags);
         __enable_irq(desc, irq, false);
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-        chip_bus_sync_unlock(desc);
+out:
+        irq_put_desc_busunlock(desc, flags);
 }
 EXPORT_SYMBOL(enable_irq);
 
@@ -477,15 +467,13 @@ static int set_irq_wake_real(unsigned int irq, unsigned int on)
  */
 int irq_set_irq_wake(unsigned int irq, unsigned int on)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
+        struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
         int ret = 0;
 
         /* wakeup-capable irqs can be shared between drivers that
          * don't need to have the same sleep mode behaviors.
          */
-        chip_bus_lock(desc);
-        raw_spin_lock_irqsave(&desc->lock, flags);
         if (on) {
                 if (desc->wake_depth++ == 0) {
                         ret = set_irq_wake_real(irq, on);
@@ -505,9 +493,7 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on)
                                 irqd_clear(&desc->irq_data, IRQD_WAKEUP_STATE);
                 }
         }
-
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-        chip_bus_sync_unlock(desc);
+        irq_put_desc_busunlock(desc, flags);
         return ret;
 }
 EXPORT_SYMBOL(irq_set_irq_wake);
@@ -519,25 +505,20 @@ EXPORT_SYMBOL(irq_set_irq_wake);
  */
 int can_request_irq(unsigned int irq, unsigned long irqflags)
 {
-        struct irq_desc *desc = irq_to_desc(irq);
-        struct irqaction *action;
         unsigned long flags;
+        struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+        int canrequest = 0;
 
         if (!desc)
                 return 0;
 
-        if (!irq_settings_can_request(desc))
-                return 0;
-
-        raw_spin_lock_irqsave(&desc->lock, flags);
-        action = desc->action;
-        if (action)
-                if (irqflags & action->flags & IRQF_SHARED)
-                        action = NULL;
-
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-
-        return !action;
+        if (irq_settings_can_request(desc)) {
+                if (desc->action)
+                        if (irqflags & desc->action->flags & IRQF_SHARED)
+                                canrequest =1;
+        }
+        irq_put_desc_unlock(desc, flags);
+        return canrequest;
 }
 
 int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,