genirq: __irq_set_trigger: change pr_warning to pr_debug

Commit 0c5d1eb77a8be917b638344a22afe1398236482b (genirq: record trigger
type) caused powerpc platforms that had no set_type() function in their
struct irq_chip to spew out warnings about "No set_type function for
IRQ...". This warning isn't necessarily justified though because the
generic powerpc platform code calls set_irq_type() (which in turn calls
__irq_set_trigger) with information from the device tree to establish
the interrupt mappings, regardless of whether the PIC can actually set
a type.

A platform's irq_chip might not have a set_type function for a variety
of reasons, for example: the platform may have the type essentially
hard-coded, or as in the case for Cell interrupts are just messages
past around that have no real concept of type, or the platform
could even have a virtual PIC as on the PS3.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 4358612..801addd 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -365,7 +365,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
                 * IRQF_TRIGGER_* but the PIC does not support multiple
                 * flow-types?
                 */
-               pr_warning("No set_type function for IRQ %d (%s)\n", irq,
+               pr_debug("No set_type function for IRQ %d (%s)\n", irq,
                                chip ? (chip->name ? : "unknown") : "unknown");
                return 0;
        }