[PATCH v2] irq: generic-chip: provide irq_free_generic_chip()

From: Bartosz Golaszewski
Date: Wed Mar 08 2017 - 12:11:26 EST


Some users of irq_alloc_generic_chip() are modules which can be
removed (e.g. gpio-ml-ioh) but have no means of freeing the allocated
generic chip. Provide a function for that.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
v1 -> v2:
- added the kernel doc

include/linux/irq.h | 1 +
kernel/irq/generic-chip.c | 12 ++++++++++++
2 files changed, 13 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index f887351..04e5120 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -950,6 +950,7 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk,
int irq_setup_alt_chip(struct irq_data *d, unsigned int type);
void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
unsigned int clr, unsigned int set);
+void irq_free_generic_chip(struct irq_chip_generic *gc);

struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);

diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index ee32870..242836e 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -545,6 +545,18 @@ void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,
}
EXPORT_SYMBOL_GPL(irq_remove_generic_chip);

+/**
+ * irq_free_generic_chip - Free the memory allocated for a chip
+ * @gc: Generic irq chip
+ *
+ * Free the data previously allocated by irq_allocate_generic_chip().
+ */
+void irq_free_generic_chip(struct irq_chip_generic *gc)
+{
+ kfree(gc);
+}
+EXPORT_SYMBOL_GPL(irq_free_generic_chip);
+
static struct irq_data *irq_gc_get_irq_data(struct irq_chip_generic *gc)
{
unsigned int virq;
--
2.9.3