genirq/devres: Use dev_name(dev) as default for devname

Allow the devname parameter to be NULL and use dev_name(dev) in this case.
This should be an appropriate default for most use cases.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: http://lkml.kernel.org/r/05c63d67-30b4-7026-02d5-ce7fb7bc185f@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 18babef39361..1613bfd48365 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -34,7 +34,7 @@ static int devm_irq_match(struct device *dev, void *res, void *data)
  *      @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
+ *      @devname: An ascii name for the claiming device, dev_name(dev) if NULL
  *      @dev_id: A cookie passed back to the handler function
  *
  *      Except for the extra @dev argument, this function takes the
@@ -58,6 +58,9 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq,
         if (!dr)
                 return -ENOMEM;
 
+        if (!devname)
+                devname = dev_name(dev);
+
         rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname,
                                   dev_id);
         if (rc) {
@@ -81,7 +84,7 @@ EXPORT_SYMBOL(devm_request_threaded_irq);
  *      @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
+ *      @devname: An ascii name for the claiming device, dev_name(dev) if NULL
  *      @dev_id: A cookie passed back to the handler function
  *
  *      Except for the extra @dev argument, this function takes the
@@ -104,6 +107,9 @@ int devm_request_any_context_irq(struct device *dev, unsigned int irq,
         if (!dr)
                 return -ENOMEM;
 
+        if (!devname)
+                devname = dev_name(dev);
+
         rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id);
         if (rc < 0) {
                 devres_free(dr);