genirq: Return the IRQ name from free_irq()
This allows callers to get back at them instead of having to store it in
another variable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 391cb73..e688e7e 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1574,20 +1574,27 @@ EXPORT_SYMBOL_GPL(remove_irq);
* have completed.
*
* This function must not be called from interrupt context.
+ *
+ * Returns the devname argument passed to request_irq.
*/
-void free_irq(unsigned int irq, void *dev_id)
+const void *free_irq(unsigned int irq, void *dev_id)
{
struct irq_desc *desc = irq_to_desc(irq);
+ struct irqaction *action;
+ const char *devname;
if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
- return;
+ return NULL;
#ifdef CONFIG_SMP
if (WARN_ON(desc->affinity_notify))
desc->affinity_notify = NULL;
#endif
- kfree(__free_irq(irq, dev_id));
+ action = __free_irq(irq, dev_id);
+ devname = action->name;
+ kfree(action);
+ return devname;
}
EXPORT_SYMBOL(free_irq);
