genirq: add support for threaded interrupts to devres

Some devices use devres_request_irq() for to install their interrupt
handler. Add support for threaded interrupts to devres as well.

[tglx - simplified and adapted to latest threadirq version]

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 24 insertions, 9 deletions

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 6fc2b720c231..dbf6a6fd116c 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -123,9 +123,20 @@ extern void free_irq(unsigned int, void *);
 
 struct device;
 
-extern int __must_check devm_request_irq(struct device *dev, unsigned int irq,
-                            irq_handler_t handler, unsigned long irqflags,
-                            const char *devname, void *dev_id);
+extern int __must_check
+devm_request_threaded_irq(struct device *dev, unsigned int irq,
+                          irq_handler_t handler, irq_handler_t thread_fn,
+                          unsigned long irqflags, const char *devname,
+                          void *dev_id);
+
+static inline int __must_check
+devm_request_irq(struct device *dev, unsigned int irq, irq_handler_t handler,
+                 unsigned long irqflags, const char *devname, void *dev_id)
+{
+        return devm_request_threaded_irq(dev, irq, handler, NULL, irqflags,
+                                         devname, dev_id);
+}
+
 extern void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id);
 
 /*
diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 38a25b8d8bff..d06df9c41cba 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -26,10 +26,12 @@ static int devm_irq_match(struct device *dev, void *res, void *data)
 }
 
 /**
- *      devm_request_irq - allocate an interrupt line for a managed device
+ *      devm_request_threaded_irq - allocate an interrupt line for a managed device
  *      @dev: device to request interrupt for
  *      @irq: Interrupt line to allocate
  *      @handler: Function to be called when the IRQ occurs
+ *      @thread_fn: function to be called in a threaded interrupt context. NULL
+ *                  for devices which handle everything in @handler
  *      @irqflags: Interrupt type flags
  *      @devname: An ascii name for the claiming device
  *      @dev_id: A cookie passed back to the handler function
@@ -42,9 +44,10 @@ static int devm_irq_match(struct device *dev, void *res, void *data)
  *      If an IRQ allocated with this function needs to be freed
  *      separately, dev_free_irq() must be used.
  */
-int devm_request_irq(struct device *dev, unsigned int irq,
-                     irq_handler_t handler, unsigned long irqflags,
-                     const char *devname, void *dev_id)
+int devm_request_threaded_irq(struct device *dev, unsigned int irq,
+                              irq_handler_t handler, irq_handler_t thread_fn,
+                              unsigned long irqflags, const char *devname,
+                              void *dev_id)
 {
         struct irq_devres *dr;
         int rc;
@@ -54,7 +57,8 @@ int devm_request_irq(struct device *dev, unsigned int irq,
         if (!dr)
                 return -ENOMEM;
 
-        rc = request_irq(irq, handler, irqflags, devname, dev_id);
+        rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname,
+                                  dev_id);
         if (rc) {
                 devres_free(dr);
                 return rc;
@@ -66,7 +70,7 @@ int devm_request_irq(struct device *dev, unsigned int irq,
 
         return 0;
 }
-EXPORT_SYMBOL(devm_request_irq);
+EXPORT_SYMBOL(devm_request_threaded_irq);
 
 /**
  *      devm_free_irq - free an interrupt