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>

2 files changed, 57 insertions, 117 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c19c0b562c8..3ea6aecd99c 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -25,22 +25,18 @@
  */
 int irq_set_chip(unsigned int irq, struct irq_chip *chip)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
-	if (!desc) {
-		WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
+	if (!desc)
 		return -EINVAL;
-	}
 
 	if (!chip)
 		chip = &no_irq_chip;
 
-	raw_spin_lock_irqsave(&desc->lock, flags);
 	irq_chip_set_defaults(chip);
 	desc->irq_data.chip = chip;
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+	irq_put_desc_unlock(desc, flags);
 	return 0;
 }
 EXPORT_SYMBOL(irq_set_chip);
@@ -52,24 +48,17 @@ EXPORT_SYMBOL(irq_set_chip);
  */
 int irq_set_irq_type(unsigned int irq, unsigned int type)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
-	int ret = -ENXIO;
+	struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+	int ret = 0;
 
-	if (!desc) {
-		printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
-		return -ENODEV;
-	}
+	if (!desc)
+		return -EINVAL;
 
 	type &= IRQ_TYPE_SENSE_MASK;
-	if (type == IRQ_TYPE_NONE)
-		return 0;
-
-	chip_bus_lock(desc);
-	raw_spin_lock_irqsave(&desc->lock, flags);
-	ret = __irq_set_trigger(desc, irq, type);
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
-	chip_bus_sync_unlock(desc);
+	if (type != IRQ_TYPE_NONE)
+		ret = __irq_set_trigger(desc, irq, type);
+	irq_put_desc_busunlock(desc, flags);
 	return ret;
 }
 EXPORT_SYMBOL(irq_set_irq_type);
@@ -83,18 +72,13 @@ EXPORT_SYMBOL(irq_set_irq_type);
  */
 int irq_set_handler_data(unsigned int irq, void *data)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
-	if (!desc) {
-		printk(KERN_ERR
-		       "Trying to install controller data for IRQ%d\n", irq);
+	if (!desc)
 		return -EINVAL;
-	}
-
-	raw_spin_lock_irqsave(&desc->lock, flags);
 	desc->irq_data.handler_data = data;
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
+	irq_put_desc_unlock(desc, flags);
 	return 0;
 }
 EXPORT_SYMBOL(irq_set_handler_data);
@@ -108,20 +92,15 @@ EXPORT_SYMBOL(irq_set_handler_data);
  */
 int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
-	if (!desc) {
-		printk(KERN_ERR
-		       "Trying to install msi data for IRQ%d\n", irq);
+	if (!desc)
 		return -EINVAL;
-	}
-
-	raw_spin_lock_irqsave(&desc->lock, flags);
 	desc->irq_data.msi_desc = entry;
 	if (entry)
 		entry->irq = irq;
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
+	irq_put_desc_unlock(desc, flags);
 	return 0;
 }
 
@@ -134,24 +113,13 @@ int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
  */
 int irq_set_chip_data(unsigned int irq, void *data)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
-	if (!desc) {
-		printk(KERN_ERR
-		       "Trying to install chip data for IRQ%d\n", irq);
-		return -EINVAL;
-	}
-
-	if (!desc->irq_data.chip) {
-		printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
+	if (!desc)
 		return -EINVAL;
-	}
-
-	raw_spin_lock_irqsave(&desc->lock, flags);
 	desc->irq_data.chip_data = data;
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
-
+	irq_put_desc_unlock(desc, flags);
 	return 0;
 }
 EXPORT_SYMBOL(irq_set_chip_data);
@@ -635,25 +603,19 @@ void
 __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 		  const char *name)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
 
-	if (!desc) {
-		printk(KERN_ERR
-		       "Trying to install type control for IRQ%d\n", irq);
+	if (!desc)
 		return;
-	}
 
 	if (!handle) {
 		handle = handle_bad_irq;
 	} else {
 		if (WARN_ON(desc->irq_data.chip == &no_irq_chip))
-			return;
+			goto out;
 	}
 
-	chip_bus_lock(desc);
-	raw_spin_lock_irqsave(&desc->lock, flags);
-
 	/* Uninstall? */
 	if (handle == handle_bad_irq) {
 		if (desc->irq_data.chip != &no_irq_chip)
@@ -670,8 +632,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 		irq_settings_set_norequest(desc);
 		irq_startup(desc);
 	}
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
-	chip_bus_sync_unlock(desc);
+out:
+	irq_put_desc_busunlock(desc, flags);
 }
 EXPORT_SYMBOL_GPL(__set_irq_handler);
 
@@ -693,14 +655,11 @@ set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
 
 void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	unsigned long flags;
+	struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
 
 	if (!desc)
 		return;
-
-	raw_spin_lock_irqsave(&desc->lock, flags);
-
 	irq_settings_clr_and_set(desc, clr, set);
 
 	irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |
@@ -714,5 +673,5 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
 
 	irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
 
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
+	irq_put_desc_unlock(desc, flags);
 }
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 99395a24f43..6cca1956c50 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,