4 files changed, 27 insertions, 35 deletions

diff --git a/drivers/sh/intc/chip.c b/drivers/sh/intc/chip.c
index 7b246efa94ea..012df2676a26 100644
--- a/drivers/sh/intc/chip.c
+++ b/drivers/sh/intc/chip.c
@@ -2,13 +2,14 @@
  * IRQ chip definitions for INTC IRQs.
  *
  * Copyright (C) 2007, 2008 Magnus Damm
- * Copyright (C) 2009, 2010 Paul Mundt
+ * Copyright (C) 2009 - 2012 Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
 #include <linux/cpumask.h>
+#include <linux/bsearch.h>
 #include <linux/io.h>
 #include "internals.h"
 
@@ -58,11 +59,6 @@ static void intc_disable(struct irq_data *data)
         }
 }
 
-static int intc_set_wake(struct irq_data *data, unsigned int on)
-{
-        return 0; /* allow wakeup, but setup hardware in intc_suspend() */
-}
-
 #ifdef CONFIG_SMP
 /*
  * This is held with the irq desc lock held, so we don't require any
@@ -78,7 +74,7 @@ static int intc_set_affinity(struct irq_data *data,
 
         cpumask_copy(data->affinity, cpumask);
 
-        return 0;
+        return IRQ_SET_MASK_OK_NOCOPY;
 }
 #endif
 
@@ -122,28 +118,12 @@ static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
                                              unsigned int nr_hp,
                                              unsigned int irq)
 {
-        int i;
-
-        /*
-         * this doesn't scale well, but...
-         *
-         * this function should only be used for cerain uncommon
-         * operations such as intc_set_priority() and intc_set_type()
-         * and in those rare cases performance doesn't matter that much.
-         * keeping the memory footprint low is more important.
-         *
-         * one rather simple way to speed this up and still keep the
-         * memory footprint down is to make sure the array is sorted
-         * and then perform a bisect to lookup the irq.
-         */
-        for (i = 0; i < nr_hp; i++) {
-                if ((hp + i)->irq != irq)
-                        continue;
+        struct intc_handle_int key;
 
-                return hp + i;
-        }
+        key.irq = irq;
+        key.handle = 0;
 
-        return NULL;
+        return bsearch(&key, hp, nr_hp, sizeof(*hp), intc_handle_int_cmp);
 }
 
 int intc_set_priority(unsigned int irq, unsigned int prio)
@@ -223,10 +203,9 @@ struct irq_chip intc_irq_chip	= {
         .irq_mask_ack           = intc_mask_ack,
         .irq_enable             = intc_enable,
         .irq_disable            = intc_disable,
-        .irq_shutdown           = intc_disable,
         .irq_set_type           = intc_set_type,
-        .irq_set_wake           = intc_set_wake,
 #ifdef CONFIG_SMP
         .irq_set_affinity       = intc_set_affinity,
 #endif
+        .flags                  = IRQCHIP_SKIP_SET_WAKE,
 };
diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
index 2fde8970dfd0..7e562ccb6997 100644
--- a/drivers/sh/intc/core.c
+++ b/drivers/sh/intc/core.c
@@ -2,7 +2,7 @@
  * Shared interrupt handling code for IPR and INTC2 types of IRQs.
  *
  * Copyright (C) 2007, 2008 Magnus Damm
- * Copyright (C) 2009, 2010 Paul Mundt
+ * Copyright (C) 2009 - 2012 Paul Mundt
  *
  * Based on intc2.c and ipr.c
  *
@@ -31,11 +31,12 @@
 #include <linux/spinlock.h>
 #include <linux/radix-tree.h>
 #include <linux/export.h>
+#include <linux/sort.h>
 #include "internals.h"
 
 LIST_HEAD(intc_list);
 DEFINE_RAW_SPINLOCK(intc_big_lock);
-unsigned int nr_intc_controllers;
+static unsigned int nr_intc_controllers;
 
 /*
  * Default priority level
@@ -267,6 +268,9 @@ int __init register_intc_controller(struct intc_desc *desc)
                         k += save_reg(d, k, hw->prio_regs[i].set_reg, smp);
                         k += save_reg(d, k, hw->prio_regs[i].clr_reg, smp);
                 }
+
+                sort(d->prio, hw->nr_prio_regs, sizeof(*d->prio),
+                     intc_handle_int_cmp, NULL);
         }
 
         if (hw->sense_regs) {
@@ -277,6 +281,9 @@ int __init register_intc_controller(struct intc_desc *desc)
 
                 for (i = 0; i < hw->nr_sense_regs; i++)
                         k += save_reg(d, k, hw->sense_regs[i].reg, 0);
+
+                sort(d->sense, hw->nr_sense_regs, sizeof(*d->sense),
+                     intc_handle_int_cmp, NULL);
         }
 
         if (hw->subgroups)
diff --git a/drivers/sh/intc/handle.c b/drivers/sh/intc/handle.c
index f461d5300b81..7863a44918a2 100644
--- a/drivers/sh/intc/handle.c
+++ b/drivers/sh/intc/handle.c
@@ -172,9 +172,8 @@ intc_get_prio_handle(struct intc_desc *desc, struct intc_desc_int *d,
         return 0;
 }
 
-static unsigned int __init intc_ack_data(struct intc_desc *desc,
-                                          struct intc_desc_int *d,
-                                          intc_enum enum_id)
+static unsigned int intc_ack_data(struct intc_desc *desc,
+                                  struct intc_desc_int *d, intc_enum enum_id)
 {
         struct intc_mask_reg *mr = desc->hw.ack_regs;
         unsigned int i, j, fn, mode;
diff --git a/drivers/sh/intc/internals.h b/drivers/sh/intc/internals.h
index b0e9155ff739..f034a979a16f 100644
--- a/drivers/sh/intc/internals.h
+++ b/drivers/sh/intc/internals.h
@@ -108,6 +108,14 @@ static inline void activate_irq(int irq)
 #endif
 }
 
+static inline int intc_handle_int_cmp(const void *a, const void *b)
+{
+        const struct intc_handle_int *_a = a;
+        const struct intc_handle_int *_b = b;
+
+        return _a->irq - _b->irq;
+}
+
 /* access.c */
 extern unsigned long
 (*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
@@ -157,7 +165,6 @@ void _intc_enable(struct irq_data *data, unsigned long handle);
 /* core.c */
 extern struct list_head intc_list;
 extern raw_spinlock_t intc_big_lock;
-extern unsigned int nr_intc_controllers;
 extern struct bus_type intc_subsys;
 
 unsigned int intc_get_dfl_prio_level(void);