genirq: Provide locked setter for chip, handler, name

Some irq_set_type() callbacks need to change the chip and the handler
when the trigger mode changes. We have already a (misnomed) setter
function for the handler which can be called from irq_set_type().

Provide one which allows to set chip and name as well. Put the
misnomed function under the COMPAT switch and provide a replacement.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 1595f91..15e6c39 100644 (file)
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -171,25 +171,44 @@ static inline int irq_has_action(unsigned int irq)
        return desc->action != NULL;
 }
 
-#ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
-static inline int irq_balancing_disabled(unsigned int irq)
+/* caller has locked the irq_desc and both params are valid */
+static inline void __irq_set_handler_locked(unsigned int irq,
+                                           irq_flow_handler_t handler)
 {
        struct irq_desc *desc;
 
        desc = irq_to_desc(irq);
-       return desc->status & IRQ_NO_BALANCING_MASK;
+       desc->handle_irq = handler;
 }
-#endif
 
 /* caller has locked the irq_desc and both params are valid */
+static inline void
+__irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip,
+                                  irq_flow_handler_t handler, const char *name)
+{
+       struct irq_desc *desc;
+
+       desc = irq_to_desc(irq);
+       irq_desc_get_irq_data(desc)->chip = chip;
+       desc->handle_irq = handler;
+       desc->name = name;
+}
+
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_COMPAT
 static inline void __set_irq_handler_unlocked(int irq,
                                              irq_flow_handler_t handler)
 {
+       __irq_set_handler_locked(irq, handler);
+}
+
+static inline int irq_balancing_disabled(unsigned int irq)
+{
        struct irq_desc *desc;
 
        desc = irq_to_desc(irq);
-       desc->handle_irq = handler;
+       return desc->status & IRQ_NO_BALANCING_MASK;
 }
+#endif
 
 static inline void
 irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)