4 files changed, 39 insertions, 19 deletions

diff --git a/include/linux/irqreturn.h b/include/linux/irqreturn.h
index 819acaaac3f5..714ba08dc092 100644
--- a/include/linux/irqreturn.h
+++ b/include/linux/irqreturn.h
@@ -8,9 +8,9 @@
  * @IRQ_WAKE_THREAD     handler requests to wake the handler thread
  */
 enum irqreturn {
-        IRQ_NONE,
-        IRQ_HANDLED,
-        IRQ_WAKE_THREAD,
+        IRQ_NONE                = (0 << 0),
+        IRQ_HANDLED             = (1 << 0),
+        IRQ_WAKE_THREAD         = (1 << 1),
 };
 
 typedef enum irqreturn irqreturn_t;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 90cb55f6d7eb..470d08c82bbe 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -133,12 +133,6 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
                 switch (res) {
                 case IRQ_WAKE_THREAD:
                         /*
-                         * Set result to handled so the spurious check
-                         * does not trigger.
-                         */
-                        res = IRQ_HANDLED;
-
-                        /*
                          * Catch drivers which return WAKE_THREAD but
                          * did not set up a thread function
                          */
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index f7ce0021e1c4..d64bafb1afd0 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -723,13 +723,16 @@ irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action) { }
  * context. So we need to disable bh here to avoid deadlocks and other
  * side effects.
  */
-static void
+static irqreturn_t
 irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action)
 {
+        irqreturn_t ret;
+
         local_bh_disable();
-        action->thread_fn(action->irq, action->dev_id);
+        ret = action->thread_fn(action->irq, action->dev_id);
         irq_finalize_oneshot(desc, action, false);
         local_bh_enable();
+        return ret;
 }
 
 /*
@@ -737,10 +740,14 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action)
  * preemtible - many of them need to sleep and wait for slow busses to
  * complete.
  */
-static void irq_thread_fn(struct irq_desc *desc, struct irqaction *action)
+static irqreturn_t irq_thread_fn(struct irq_desc *desc,
+                struct irqaction *action)
 {
-        action->thread_fn(action->irq, action->dev_id);
+        irqreturn_t ret;
+
+        ret = action->thread_fn(action->irq, action->dev_id);
         irq_finalize_oneshot(desc, action, false);
+        return ret;
 }
 
 /*
@@ -753,7 +760,8 @@ static int irq_thread(void *data)
         };
         struct irqaction *action = data;
         struct irq_desc *desc = irq_to_desc(action->irq);
-        void (*handler_fn)(struct irq_desc *desc, struct irqaction *action);
+        irqreturn_t (*handler_fn)(struct irq_desc *desc,
+                        struct irqaction *action);
         int wake;
 
         if (force_irqthreads & test_bit(IRQTF_FORCED_THREAD,
@@ -783,8 +791,12 @@ static int irq_thread(void *data)
                         desc->istate |= IRQS_PENDING;
                         raw_spin_unlock_irq(&desc->lock);
                 } else {
+                        irqreturn_t action_ret;
+
                         raw_spin_unlock_irq(&desc->lock);
-                        handler_fn(desc, action);
+                        action_ret = handler_fn(desc, action);
+                        if (!noirqdebug)
+                                note_interrupt(action->irq, desc, action_ret);
                 }
 
                 wake = atomic_dec_and_test(&desc->threads_active);
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index c9a78ba30b6f..aa57d5da18c1 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -167,6 +167,13 @@ out:
                   jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
 }
 
+static inline int bad_action_ret(irqreturn_t action_ret)
+{
+        if (likely(action_ret <= (IRQ_HANDLED | IRQ_WAKE_THREAD)))
+                return 0;
+        return 1;
+}
+
 /*
  * If 99,900 of the previous 100,000 interrupts have not been handled
  * then assume that the IRQ is stuck in some manner. Drop a diagnostic
@@ -182,7 +189,7 @@ __report_bad_irq(unsigned int irq, struct irq_desc *desc,
         struct irqaction *action;
         unsigned long flags;
 
-        if (action_ret != IRQ_HANDLED && action_ret != IRQ_NONE) {
+        if (bad_action_ret(action_ret)) {
                 printk(KERN_ERR "irq event %d: bogus return value %x\n",
                                 irq, action_ret);
         } else {
@@ -263,7 +270,16 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
         if (desc->istate & IRQS_POLL_INPROGRESS)
                 return;
 
-        if (unlikely(action_ret != IRQ_HANDLED)) {
+        /* we get here again via the threaded handler */
+        if (action_ret == IRQ_WAKE_THREAD)
+                return;
+
+        if (bad_action_ret(action_ret)) {
+                report_bad_irq(irq, desc, action_ret);
+                return;
+        }
+
+        if (unlikely(action_ret == IRQ_NONE)) {
                 /*
                  * If we are seeing only the odd spurious IRQ caused by
                  * bus asynchronicity then don't eventually trigger an error,
@@ -275,8 +291,6 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
                 else
                         desc->irqs_unhandled++;
                 desc->last_unhandled = jiffies;
-                if (unlikely(action_ret != IRQ_NONE))
-                        report_bad_irq(irq, desc, action_ret);
         }
 
         if (unlikely(try_misrouted_irq(irq, desc, action_ret))) {