genirq: Introduce irq_do_set_affinity() to reduce duplicated code

All invocations of chip->irq_set_affinity() are doing the same return
value checks. Let them all use a common function.

[ tglx: removed the silly likely while at it ]

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Keping Chen <chenkeping@huawei.com>
Link: http://lkml.kernel.org/r/1333120296-13563-3-git-send-email-jiang.liu@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 8e5c56b..001fa5b 100644 (file)
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -101,6 +101,9 @@ extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
 
 extern void irq_set_thread_affinity(struct irq_desc *desc);
 
+extern int irq_do_set_affinity(struct irq_data *data,
+                              const struct cpumask *dest, bool force);
+
 /* Inline functions for support of irq chips on slow busses */
 static inline void chip_bus_lock(struct irq_desc *desc)
 {

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index bb32326..a1b9033 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -139,6 +139,25 @@ static inline void
 irq_get_pending(struct cpumask *mask, struct irq_desc *desc) { }
 #endif
 
+int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
+                       bool force)
+{
+       struct irq_desc *desc = irq_data_to_desc(data);
+       struct irq_chip *chip = irq_data_get_irq_chip(data);
+       int ret;
+
+       ret = chip->irq_set_affinity(data, mask, false);
+       switch (ret) {
+       case IRQ_SET_MASK_OK:
+               cpumask_copy(data->affinity, mask);
+       case IRQ_SET_MASK_OK_NOCOPY:
+               irq_set_thread_affinity(desc);
+               ret = 0;
+       }
+
+       return ret;
+}
+
 int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask)
 {
        struct irq_chip *chip = irq_data_get_irq_chip(data);
@@ -149,14 +168,7 @@ int __irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask)
                return -EINVAL;
 
        if (irq_can_move_pcntxt(data)) {
-               ret = chip->irq_set_affinity(data, mask, false);
-               switch (ret) {
-               case IRQ_SET_MASK_OK:
-                       cpumask_copy(data->affinity, mask);
-               case IRQ_SET_MASK_OK_NOCOPY:
-                       irq_set_thread_affinity(desc);
-                       ret = 0;
-               }
+               ret = irq_do_set_affinity(data, mask, false);
        } else {
                irqd_set_move_pending(data);
                irq_copy_pending(desc, mask);
@@ -280,9 +292,8 @@ EXPORT_SYMBOL_GPL(irq_set_affinity_notifier);
 static int
 setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
 {
-       struct irq_chip *chip = irq_desc_get_chip(desc);
        struct cpumask *set = irq_default_affinity;
-       int ret, node = desc->irq_data.node;
+       int node = desc->irq_data.node;
 
        /* Excludes PER_CPU and NO_BALANCE interrupts */
        if (!irq_can_set_affinity(irq))
@@ -308,13 +319,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
                if (cpumask_intersects(mask, nodemask))
                        cpumask_and(mask, mask, nodemask);
        }
-       ret = chip->irq_set_affinity(&desc->irq_data, mask, false);
-       switch (ret) {
-       case IRQ_SET_MASK_OK:
-               cpumask_copy(desc->irq_data.affinity, mask);
-       case IRQ_SET_MASK_OK_NOCOPY:
-               irq_set_thread_affinity(desc);
-       }
+       irq_do_set_affinity(&desc->irq_data, mask, false);
        return 0;
 }
 #else

diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index c3c8975..ca3f4aa 100644 (file)
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -42,17 +42,8 @@ void irq_move_masked_irq(struct irq_data *idata)
         * For correct operation this depends on the caller
         * masking the irqs.
         */
-       if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
-                  < nr_cpu_ids)) {
-               int ret = chip->irq_set_affinity(&desc->irq_data,
-                                                desc->pending_mask, false);
-               switch (ret) {
-               case IRQ_SET_MASK_OK:
-                       cpumask_copy(desc->irq_data.affinity, desc->pending_mask);
-               case IRQ_SET_MASK_OK_NOCOPY:
-                       irq_set_thread_affinity(desc);
-               }
-       }
+       if (cpumask_any_and(desc->pending_mask, cpu_online_mask) < nr_cpu_ids)
+               irq_do_set_affinity(&desc->irq_data, desc->pending_mask, false);
 
        cpumask_clear(desc->pending_mask);
 }