Patch "platform: don't return 0 from platform_get_irq[_byname]() on error" has been added to the 4.8-stable tree

This is a note to let you know that I've just added the patch titled

platform: don't return 0 from platform_get_irq[_byname]() on error

to the 4.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
platform-don-t-return-0-from-platform_get_irq-on-error.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Sergei Shtylyov <[email protected]>
Date: Mon, 4 Jul 2016 01:04:24 +0300
Subject: platform: don't return 0 from platform_get_irq[_byname]() on error

From: Sergei Shtylyov <[email protected]>

commit e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af upstream.

of_irq_get[_byname]() return 0 iff irq_create_of_mapping() call fails. Returning both error code and 0 on failure is a sign of a misdesigned API, it makes the failure check unnecessarily complex and error prone. We should rely on the platform IRQ resource in this case, not return 0, especially as 0 can be a valid IRQ resource too...

---
 drivers/base/platform.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -97,7 +97,7 @@ int platform_get_irq(struct platform_dev
 		int ret;
 
 		ret = of_irq_get(dev->dev.of_node, num);
-		if (ret >= 0 || ret == -EPROBE_DEFER)
+		if (ret > 0 || ret == -EPROBE_DEFER)
 			return ret;
 	}
 

@@ -175,7 +175,7 @@ int platform_get_irq_byname(struct platf
 		int ret;
 
 		ret = of_irq_get_byname(dev->dev.of_node, name);
-		if (ret >= 0 || ret == -EPROBE_DEFER)
+		if (ret > 0 || ret == -EPROBE_DEFER)
 			return ret;
 	}
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.8/platform-don-t-return-0-from-platform_get_irq-on-error.patch