genirq: Provide compat handling for chip->disable()/shutdown()

Wrap the old chip functions disable() and shutdown() until the
migration is complete and the old chip functions are removed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20100927121842.532070631@linutronix.de>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

kernel/irq/autoprobe.c

@@ -98,7 +98,7 @@ unsigned long probe_irq_on(void)
 			/* It triggered already - consider it spurious. */
 			if (!(status & IRQ_WAITING)) {
 				desc->status = status & ~IRQ_AUTODETECT;
-				desc->irq_data.chip->shutdown(i);
+				desc->irq_data.chip->irq_shutdown(&desc->irq_data);
 			} else
 				if (i < 32)
 					mask |= 1 << i;
@@ -137,7 +137,7 @@ unsigned int probe_irq_mask(unsigned long val)
 				mask |= 1 << i;
 
 			desc->status = status & ~IRQ_AUTODETECT;
-			desc->irq_data.chip->shutdown(i);
+			desc->irq_data.chip->irq_shutdown(&desc->irq_data);
 		}
 		raw_spin_unlock_irq(&desc->lock);
 	}
@@ -181,7 +181,7 @@ int probe_irq_off(unsigned long val)
 				nr_of_irqs++;
 			}
 			desc->status = status & ~IRQ_AUTODETECT;
-			desc->irq_data.chip->shutdown(i);
+			desc->irq_data.chip->irq_shutdown(&desc->irq_data);
 		}
 		raw_spin_unlock_irq(&desc->lock);
 	}

kernel/irq/chip.c

@@ -298,7 +298,7 @@ static void default_enable(struct irq_data *data)
 /*
  * default disable function
  */
-static void default_disable(unsigned int irq)
+static void default_disable(struct irq_data *data)
 {
 }
 
@@ -316,9 +316,9 @@ static unsigned int default_startup(unsigned int irq)
 /*
  * default shutdown function
  */
-static void default_shutdown(unsigned int irq)
+static void default_shutdown(struct irq_data *data)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
+	struct irq_desc *desc = irq_data_to_desc(data);
 
 	desc->irq_data.chip->irq_mask(&desc->irq_data);
 	desc->status |= IRQ_MASKED;
@@ -355,6 +355,16 @@ static void compat_irq_enable(struct irq_data *data)
 	data->chip->enable(data->irq);
 }
 
+static void compat_irq_disable(struct irq_data *data)
+{
+	data->chip->disable(data->irq);
+}
+
+static void compat_irq_shutdown(struct irq_data *data)
+{
+	data->chip->shutdown(data->irq);
+}
+
 static void compat_bus_lock(struct irq_data *data)
 {
 	data->chip->bus_lock(data->irq);
@@ -376,28 +386,35 @@ void irq_chip_set_defaults(struct irq_chip *chip)
 	 */
 	if (chip->enable)
 		chip->irq_enable = compat_irq_enable;
+	if (chip->disable)
+		chip->irq_disable = compat_irq_disable;
+	if (chip->shutdown)
+		chip->irq_shutdown = compat_irq_shutdown;
 
 	/*
 	 * The real defaults
 	 */
 	if (!chip->irq_enable)
 		chip->irq_enable = default_enable;
-	if (!chip->disable)
+	if (!chip->irq_disable)
-		chip->disable = default_disable;
+		chip->irq_disable = default_disable;
 	if (!chip->startup)
 		chip->startup = default_startup;
 	/*
-	 * We use chip->disable, when the user provided its own. When
+	 * We use chip->irq_disable, when the user provided its own. When
-	 * we have default_disable set for chip->disable, then we need
+	 * we have default_disable set for chip->irq_disable, then we need
 	 * to use default_shutdown, otherwise the irq line is not
 	 * disabled on free_irq():
 	 */
-	if (!chip->shutdown)
+	if (!chip->irq_shutdown)
-		chip->shutdown = chip->disable != default_disable ?
+		chip->irq_shutdown = chip->irq_disable != default_disable ?
-			chip->disable : default_shutdown;
+			chip->irq_disable : default_shutdown;
 	if (!chip->end)
 		chip->end = dummy_irq_chip.end;
 
+	/*
+	 * Now fix up the remaining compat handlers
+	 */
 	if (chip->bus_lock)
 		chip->irq_bus_lock = compat_bus_lock;
 	if (chip->bus_sync_unlock)

kernel/irq/handle.c

@@ -327,8 +327,6 @@ struct irq_chip no_irq_chip = {
 	.irq_disable	= noop,
 	.irq_ack	= ack_bad,
 	.startup	= compat_noop_ret,
-	.shutdown	= compat_noop,
-	.disable	= compat_noop,
 	.end		= compat_noop,
 };
 
@@ -346,8 +344,6 @@ struct irq_chip dummy_irq_chip = {
 	.irq_mask	= noop,
 	.irq_unmask	= noop,
 	.startup	= compat_noop_ret,
-	.shutdown	= compat_noop,
-	.disable	= compat_noop,
 	.end		= compat_noop,
 };
 

kernel/irq/manage.c

@@ -223,7 +223,7 @@ void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
 
 	if (!desc->depth++) {
 		desc->status |= IRQ_DISABLED;
-		desc->irq_data.chip->disable(irq);
+		desc->irq_data.chip->irq_disable(&desc->irq_data);
 	}
 }
 
@@ -919,10 +919,10 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
 	/* If this was the last handler, shut down the IRQ line: */
 	if (!desc->action) {
 		desc->status |= IRQ_DISABLED;
-		if (desc->irq_data.chip->shutdown)
+		if (desc->irq_data.chip->irq_shutdown)
-			desc->irq_data.chip->shutdown(irq);
+			desc->irq_data.chip->irq_shutdown(&desc->irq_data);
 		else
-			desc->irq_data.chip->disable(irq);
+			desc->irq_data.chip->irq_disable(&desc->irq_data);
 	}
 
 #ifdef CONFIG_SMP

kernel/irq/spurious.c

@@ -254,7 +254,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
 		printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
 		desc->status |= IRQ_DISABLED | IRQ_SPURIOUS_DISABLED;
 		desc->depth++;
-		desc->irq_data.chip->disable(irq);
+		desc->irq_data.chip->irq_disable(&desc->irq_data);
 
 		mod_timer(&poll_spurious_irq_timer,
 			  jiffies + POLL_SPURIOUS_IRQ_INTERVAL);