X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=kernel%2Firq%2Fmanage.c;h=7c85d69188efce43ba19429c7da8cb3f9677a9ae;hb=93bbad8fe13a25dcf7f3bc628a71d1a7642ae61b;hp=8b961adc3bd2d8f27cc14b2b0701e93522e2c232;hpb=574009c1a895aeeb85eaab29c235d75852b09eb8;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 8b961adc3bd..7c85d69188e 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -328,12 +328,14 @@ int setup_irq(unsigned int irq, struct irqaction *new)
 	return 0;
 
 mismatch:
+#ifdef CONFIG_DEBUG_SHIRQ
 	if (!(new->flags & IRQF_PROBE_SHARED)) {
 		printk(KERN_ERR "IRQ handler type mismatch for IRQ %d\n", irq);
 		if (old_name)
 			printk(KERN_ERR "current handler: %s\n", old_name);
 		dump_stack();
 	}
+#endif
 	spin_unlock_irqrestore(&desc->lock, flags);
 	return -EBUSY;
 }
@@ -357,6 +359,7 @@ void free_irq(unsigned int irq, void *dev_id)
 	struct irq_desc *desc;
 	struct irqaction **p;
 	unsigned long flags;
+	irqreturn_t (*handler)(int, void *) = NULL;
 
 	WARN_ON(in_interrupt());
 	if (irq >= NR_IRQS)
@@ -396,6 +399,8 @@ void free_irq(unsigned int irq, void *dev_id)
 
 			/* Make sure it's not being used on another CPU */
 			synchronize_irq(irq);
+			if (action->flags & IRQF_SHARED)
+				handler = action->handler;
 			kfree(action);
 			return;
 		}
@@ -403,6 +408,17 @@ void free_irq(unsigned int irq, void *dev_id)
 		spin_unlock_irqrestore(&desc->lock, flags);
 		return;
 	}
+#ifdef CONFIG_DEBUG_SHIRQ
+	if (handler) {
+		/*
+		 * It's a shared IRQ -- the driver ought to be prepared for it
+		 * to happen even now it's being freed, so let's make sure....
+		 * We do this after actually deregistering it, to make sure that
+		 * a 'real' IRQ doesn't run in parallel with our fake
+		 */
+		handler(irq, dev_id);
+	}
+#endif
 }
 EXPORT_SYMBOL(free_irq);
 
@@ -475,6 +491,25 @@ int request_irq(unsigned int irq, irq_handler_t handler,
 
 	select_smp_affinity(irq);
 
+#ifdef CONFIG_DEBUG_SHIRQ
+	if (irqflags & IRQF_SHARED) {
+		/*
+		 * It's a shared IRQ -- the driver ought to be prepared for it
+		 * to happen immediately, so let's make sure....
+		 * 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;
+
+			local_irq_save(flags);
+			handler(irq, dev_id);
+			local_irq_restore(flags);
+		} else
+			handler(irq, dev_id);
+	}
+#endif
+
 	retval = setup_irq(irq, action);
 	if (retval)
 		kfree(action);