x86, irq: Keep chip_data in create_irq_nr and destroy_irq

[pandora-kernel.git] / kernel / irq / chip.c

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index ecc3fa2..d70394f 100644 (file)
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -18,11 +18,7 @@
 
 #include "internals.h"
 
-/**
- *     dynamic_irq_init - initialize a dynamically allocated irq
- *     @irq:   irq number to initialize
- */
-void dynamic_irq_init(unsigned int irq)
+static void dynamic_irq_init_x(unsigned int irq, bool keep_chip_data)
 {
        struct irq_desc *desc;
        unsigned long flags;
@@ -41,7 +37,8 @@ void dynamic_irq_init(unsigned int irq)
        desc->depth = 1;
        desc->msi_desc = NULL;
        desc->handler_data = NULL;
-       desc->chip_data = NULL;
+       if (!keep_chip_data)
+               desc->chip_data = NULL;
        desc->action = NULL;
        desc->irq_count = 0;
        desc->irqs_unhandled = 0;
@@ -55,10 +52,26 @@ void dynamic_irq_init(unsigned int irq)
 }
 
 /**
- *     dynamic_irq_cleanup - cleanup a dynamically allocated irq
+ *     dynamic_irq_init - initialize a dynamically allocated irq
  *     @irq:   irq number to initialize
  */
-void dynamic_irq_cleanup(unsigned int irq)
+void dynamic_irq_init(unsigned int irq)
+{
+       dynamic_irq_init_x(irq, false);
+}
+
+/**
+ *     dynamic_irq_init_keep_chip_data - initialize a dynamically allocated irq
+ *     @irq:   irq number to initialize
+ *
+ *     does not set irq_to_desc(irq)->chip_data to NULL
+ */
+void dynamic_irq_init_keep_chip_data(unsigned int irq)
+{
+       dynamic_irq_init_x(irq, true);
+}
+
+static void dynamic_irq_cleanup_x(unsigned int irq, bool keep_chip_data)
 {
        struct irq_desc *desc = irq_to_desc(irq);
        unsigned long flags;
@@ -77,7 +90,8 @@ void dynamic_irq_cleanup(unsigned int irq)
        }
        desc->msi_desc = NULL;
        desc->handler_data = NULL;
-       desc->chip_data = NULL;
+       if (!keep_chip_data)
+               desc->chip_data = NULL;
        desc->handle_irq = handle_bad_irq;
        desc->chip = &no_irq_chip;
        desc->name = NULL;
@@ -85,6 +99,26 @@ void dynamic_irq_cleanup(unsigned int irq)
        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
+/**
+ *     dynamic_irq_cleanup - cleanup a dynamically allocated irq
+ *     @irq:   irq number to initialize
+ */
+void dynamic_irq_cleanup(unsigned int irq)
+{
+       dynamic_irq_cleanup_x(irq, false);
+}
+
+/**
+ *     dynamic_irq_cleanup_keep_chip_data - cleanup a dynamically allocated irq
+ *     @irq:   irq number to initialize
+ *
+ *     does not set irq_to_desc(irq)->chip_data to NULL
+ */
+void dynamic_irq_cleanup_keep_chip_data(unsigned int irq)
+{
+       dynamic_irq_cleanup_x(irq, true);
+}
+
 
 /**
  *     set_irq_chip - set the irq chip for an irq