6 files changed, 34 insertions, 14 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 615ce97c6cfd..f1a73f0b54e7 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -352,13 +352,10 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
 	 * keep it masked and get out of here
 	 */
 	action = desc->action;
-	if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
-		desc->status |= IRQ_PENDING;
+	if (unlikely(!action || (desc->status & IRQ_DISABLED)))
 		goto out_unlock;
-	}
 
 	desc->status |= IRQ_INPROGRESS;
-	desc->status &= ~IRQ_PENDING;
 	spin_unlock(&desc->lock);
 
 	action_ret = handle_IRQ_event(irq, action);
diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index d8ee241115f5..6d9204f3a370 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -1,5 +1,6 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/device.h>
 
 /*
  * Device resource management aware IRQ request/free implementation.
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 203a518b6f14..7230d914eaa2 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -462,7 +462,9 @@ void free_irq(unsigned int irq, void *dev_id)
 		 * We do this after actually deregistering it, to make sure that
 		 * a 'real' IRQ doesn't run in parallel with our fake
 		 */
+		local_irq_save(flags);
 		handler(irq, dev_id);
+		local_irq_restore(flags);
 	}
 #endif
 }
@@ -545,14 +547,11 @@ int request_irq(unsigned int irq, irq_handler_t handler,
 		 * We do this before actually registering it, to make sure that
 		 * a 'real' IRQ doesn't run in parallel with our fake
 		 */
-		if (irqflags & IRQF_DISABLED) {
-			unsigned long flags;
+		unsigned long flags;
 
-			local_irq_save(flags);
-			handler(irq, dev_id);
-			local_irq_restore(flags);
-		} else
-			handler(irq, dev_id);
+		local_irq_save(flags);
+		handler(irq, dev_id);
+		local_irq_restore(flags);
 	}
 #endif
 
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index b4f1674fca79..50b81b98046a 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -19,7 +19,15 @@ static struct proc_dir_entry *root_irq_dir;
 static int irq_affinity_read_proc(char *page, char **start, off_t off,
 				  int count, int *eof, void *data)
 {
-	int len = cpumask_scnprintf(page, count, irq_desc[(long)data].affinity);
+	struct irq_desc *desc = irq_desc + (long)data;
+	cpumask_t *mask = &desc->affinity;
+	int len;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+	if (desc->status & IRQ_MOVE_PENDING)
+		mask = &desc->pending_mask;
+#endif
+	len = cpumask_scnprintf(page, count, *mask);
 
 	if (count - len < 2)
 		return -EINVAL;
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index 5bfeaed7e487..a8046791ba2d 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -62,7 +62,12 @@ void check_irq_resend(struct irq_desc *desc, unsigned int irq)
 	 */
 	desc->chip->enable(irq);
 
-	if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
+	/*
+	 * We do not resend level type interrupts. Level type
+	 * interrupts are resent by hardware when they are still
+	 * active.
+	 */
+	if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
 		desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY;
 
 		if (!desc->chip || !desc->chip->retrigger ||
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index bd9e272d55e9..32b161972fad 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -172,7 +172,17 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
 		    irqreturn_t action_ret)
 {
 	if (unlikely(action_ret != IRQ_HANDLED)) {
-		desc->irqs_unhandled++;
+		/*
+		 * If we are seeing only the odd spurious IRQ caused by
+		 * bus asynchronicity then don't eventually trigger an error,
+		 * otherwise the couter becomes a doomsday timer for otherwise
+		 * working systems
+		 */
+		if (jiffies - desc->last_unhandled > HZ/10)
+			desc->irqs_unhandled = 1;
+		else
+			desc->irqs_unhandled++;
+		desc->last_unhandled = jiffies;
 		if (unlikely(action_ret != IRQ_NONE))
 			report_bad_irq(irq, desc, action_ret);
 	}