Re: [PATCH v2] dt: platform driver: Fill the resources before probe and defer if needed

From: Russell King - ARM Linux
Date: Sat Mar 08 2014 - 07:00:09 EST


On Sat, Mar 08, 2014 at 07:37:58AM +0000, Grant Likely wrote:
> I believe we already talked about the above test. This function must
> only process devices created by of_platform_populate(). Merely checking
> the of_node pointer is not a sufficient test because there are other
> paths in the kernel for creating platform_devices that might get a node
> pointer attached to it.

There definitely are: there are a number of platform device drivers
which create a new platform device structure, and copy the of_node
pointer across.

However, that's really sick code, and can result in the platform device
driver probing the device it just created... this practise should be
outlawed.

--
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/