commit 4699923861513671d3f6ade8efb4e56a9a7ecadf
author Thomas Gleixner <tglx@linutronix.de> Wed Feb 02 21:41:14 2011 +0000
committer Thomas Gleixner <tglx@linutronix.de> Sat Feb 19 12:58:10 2011 +0100
tree 862cda99b9af6fe96fda955107f24a7b5cc97a18
parent 3b56f0585fd4c02d047dc406668cb40159b2d340

genirq: Consolidate startup/shutdown of interrupts

Aside of duplicated code some of the startup/shutdown sites do not
handle the MASKED/DISABLED flags and the depth field at all. Move that
to a helper function and take care of it there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.787481468@linutronix.de>

kernel/irq/chip.c

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 3125878..988fe7a 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -192,6 +192,25 @@
 }
 EXPORT_SYMBOL_GPL(set_irq_nested_thread);
 
+int irq_startup(struct irq_desc *desc)
+{
+	desc->status &= ~(IRQ_MASKED | IRQ_DISABLED);
+	desc->depth = 0;
+
+	if (desc->irq_data.chip->irq_startup)
+		return desc->irq_data.chip->irq_startup(&desc->irq_data);
+
+	desc->irq_data.chip->irq_enable(&desc->irq_data);
+	return 0;
+}
+
+void irq_shutdown(struct irq_desc *desc)
+{
+	desc->status |= IRQ_MASKED | IRQ_DISABLED;
+	desc->depth = 1;
+	desc->irq_data.chip->irq_shutdown(&desc->irq_data);
+}
+
 /*
  * default enable function
  */
@@ -211,17 +230,6 @@
 }
 
 /*
- * default startup function
- */
-static unsigned int default_startup(struct irq_data *data)
-{
-	struct irq_desc *desc = irq_data_to_desc(data);
-
-	desc->irq_data.chip->irq_enable(data);
-	return 0;
-}
-
-/*
  * default shutdown function
  */
 static void default_shutdown(struct irq_data *data)
@@ -229,7 +237,6 @@
 	struct irq_desc *desc = irq_data_to_desc(data);
 
 	desc->irq_data.chip->irq_mask(&desc->irq_data);
-	desc->status |= IRQ_MASKED;
 }
 
 #ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
@@ -337,8 +344,6 @@
 		chip->irq_enable = default_enable;
 	if (!chip->irq_disable)
 		chip->irq_disable = default_disable;
-	if (!chip->irq_startup)
-		chip->irq_startup = default_startup;
 	/*
 	 * We use chip->irq_disable, when the user provided its own. When
 	 * we have default_disable set for chip->irq_disable, then we need
@@ -747,10 +752,8 @@
 	desc->name = name;
 
 	if (handle != handle_bad_irq && is_chained) {
-		desc->status &= ~IRQ_DISABLED;
 		desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
-		desc->depth = 0;
-		desc->irq_data.chip->irq_startup(&desc->irq_data);
+		irq_startup(desc);
 	}
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 	chip_bus_sync_unlock(desc);