genirq: Add devm_request_any_context_irq()

Some drivers use request_any_context_irq() but there isn't a
devm_* function for it. Add one so that these drivers don't need
to explicitly free the irq on driver detach.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: http://lkml.kernel.org/r/1388709460-19222-3-git-send-email-sboyd@codeaurora.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 45 insertions, 0 deletions

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index bd8e788d71e0..1ef0606797c9 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -73,6 +73,51 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq,
 EXPORT_SYMBOL(devm_request_threaded_irq);
 
 /**
+ *      devm_request_any_context_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
+ *
+ *      Except for the extra @dev argument, this function takes the
+ *      same arguments and performs the same function as
+ *      request_any_context_irq().  IRQs requested with this function will be
+ *      automatically freed on driver detach.
+ *
+ *      If an IRQ allocated with this function needs to be freed
+ *      separately, devm_free_irq() must be used.
+ */
+int devm_request_any_context_irq(struct device *dev, unsigned int irq,
+                              irq_handler_t handler, unsigned long irqflags,
+                              const char *devname, void *dev_id)
+{
+        struct irq_devres *dr;
+        int rc;
+
+        dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
+                          GFP_KERNEL);
+        if (!dr)
+                return -ENOMEM;
+
+        rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id);
+        if (rc) {
+                devres_free(dr);
+                return rc;
+        }
+
+        dr->irq = irq;
+        dr->dev_id = dev_id;
+        devres_add(dev, dr);
+
+        return 0;
+}
+EXPORT_SYMBOL(devm_request_any_context_irq);
+
+/**
  *      devm_free_irq - free an interrupt
  *      @dev: device to free interrupt for
  *      @irq: Interrupt line to free