genirq: Provide compat handling for chip->enable()

Wrap the old chip function enable() 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: <20100927121842.437159182@linutronix.de>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 21 insertions, 8 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c8648a83b80a..a95b47831269 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -287,9 +287,9 @@ EXPORT_SYMBOL_GPL(set_irq_nested_thread);
 /*
  * default enable function
  */
-static void default_enable(unsigned int irq)
+static void default_enable(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_unmask(&desc->irq_data);
         desc->status &= ~IRQ_MASKED;
@@ -309,7 +309,7 @@ static unsigned int default_startup(unsigned int irq)
 {
         struct irq_desc *desc = irq_to_desc(irq);
 
-        desc->irq_data.chip->enable(irq);
+        desc->irq_data.chip->irq_enable(&desc->irq_data);
         return 0;
 }
 
@@ -350,6 +350,11 @@ static void compat_irq_eoi(struct irq_data *data)
         data->chip->eoi(data->irq);
 }
 
+static void compat_irq_enable(struct irq_data *data)
+{
+        data->chip->enable(data->irq);
+}
+
 static void compat_bus_lock(struct irq_data *data)
 {
         data->chip->bus_lock(data->irq);
@@ -365,8 +370,18 @@ static void compat_bus_sync_unlock(struct irq_data *data)
  */
 void irq_chip_set_defaults(struct irq_chip *chip)
 {
-        if (!chip->enable)
-                chip->enable = default_enable;
+        /*
+         * Compat fixup functions need to be before we set the
+         * defaults for enable/disable/startup/shutdown
+         */
+        if (chip->enable)
+                chip->irq_enable = compat_irq_enable;
+
+        /*
+         * The real defaults
+         */
+        if (!chip->irq_enable)
+                chip->irq_enable = default_enable;
         if (!chip->disable)
                 chip->disable = default_disable;
         if (!chip->startup)
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 9ba7aece0e4d..ac8c749dfee5 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -328,7 +328,6 @@ struct irq_chip no_irq_chip = {
         .irq_ack        = ack_bad,
         .startup        = compat_noop_ret,
         .shutdown       = compat_noop,
-        .enable         = compat_noop,
         .disable        = compat_noop,
         .end            = compat_noop,
 };
@@ -348,7 +347,6 @@ struct irq_chip dummy_irq_chip = {
         .irq_unmask     = noop,
         .startup        = compat_noop_ret,
         .shutdown       = compat_noop,
-        .enable         = compat_noop,
         .disable        = compat_noop,
         .end            = compat_noop,
 };
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 47c56a097928..a798a2328f8a 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -60,7 +60,7 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq)
         /*
          * Make sure the interrupt is enabled, before resending it:
          */
-        desc->irq_data.chip->enable(irq);
+        desc->irq_data.chip->irq_enable(&desc->irq_data);
 
         /*
          * We do not resend level type interrupts. Level type