Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fixes from Thomas Glexiner:

 - unbreak the irq trigger type check for legacy platforms

 - a handful fixes for ARM GIC v3/4 interrupt controllers

 - a few trivial fixes all over the place

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq/matrix: Make - vs ?: Precedence explicit
  irqchip/imgpdc: Use resource_size function on resource object
  irqchip/qcom: Fix u32 comparison with value less than zero
  irqchip/exiu: Fix return value check in exiu_init()
  irqchip/gic-v3-its: Remove artificial dependency on PCI
  irqchip/gic-v4: Add forward definition of struct irq_domain_ops
  irqchip/gic-v3: pr_err() strings should end with newlines
  irqchip/s3c24xx: pr_err() strings should end with newlines
  irqchip/gic-v3: Fix ppi-partitions lookup
  irqchip/gic-v4: Clear IRQ_DISABLE_UNLAZY again if mapping fails
  genirq: Track whether the trigger type has been set

2 files changed, 13 insertions, 2 deletions

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 2ff1c0c82fc9..0f922729bab9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1246,7 +1246,18 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                  * set the trigger type must match. Also all must
                  * agree on ONESHOT.
                  */
-                unsigned int oldtype = irqd_get_trigger_type(&desc->irq_data);
+                unsigned int oldtype;
+
+                /*
+                 * If nobody did set the configuration before, inherit
+                 * the one provided by the requester.
+                 */
+                if (irqd_trigger_type_was_set(&desc->irq_data)) {
+                        oldtype = irqd_get_trigger_type(&desc->irq_data);
+                } else {
+                        oldtype = new->flags & IRQF_TRIGGER_MASK;
+                        irqd_set_trigger_type(&desc->irq_data, oldtype);
+                }
 
                 if (!((old->flags & new->flags) & IRQF_SHARED) ||
                     (oldtype != (new->flags & IRQF_TRIGGER_MASK)) ||
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index a3cbbc8191c5..7df2480005f8 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -384,7 +384,7 @@ unsigned int irq_matrix_available(struct irq_matrix *m, bool cpudown)
 {
         struct cpumap *cm = this_cpu_ptr(m->maps);
 
-        return m->global_available - cpudown ? cm->available : 0;
+        return (m->global_available - cpudown) ? cm->available : 0;
 }
 
 /**