linux-kernel - Re: [PATCH 1/2] of/unittest: Show broken behaviour in the platform bus

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Message-ID: <CAL_JsqK0rq6+WeK4hVMYQnKUd2K7co3vi=DpF8pjH6tbt0B5vQ@mail.gmail.com>
Date:	Mon, 8 Jun 2015 15:16:39 -0500
From:	Rob Herring <robh@...nel.org>
To:	Grant Likely <grant.likely@...aro.org>
Cc:	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Subject: Re: [PATCH 1/2] of/unittest: Show broken behaviour in the platform bus

On Sun, Jun 7, 2015 at 9:20 AM, Grant Likely <grant.likely@...aro.org> wrote:
> Add a single resource to the test bus device to exercise the platform
> bus code a little more. This isn't strictly a devicetree test, but it is
> a corner case that the devicetree runs into. Until we've got platform
> device unittests, it can live here. It doesn't need to be an explicit
> text because the kernel will oops when it is wrong.

Isn't the unittest oops'ing a problem?

> Cc: Pantelis Antoniou <pantelis.antoniou@...sulko.com>
> Cc: Wolfram Sang <wsa@...-dreams.de>
> Cc: Rob Herring <robh@...nel.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> Signed-off-by: Grant Likely <grant.likely@...aro.org>
> ---
>  drivers/of/unittest.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 18016341d5a9..0a27b38c3041 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -753,6 +753,11 @@ static void __init of_unittest_match_node(void)
>         }
>  }
>
> +static struct resource test_bus_res = {
> +       .start = 0xfffffff8,
> +       .end = 0xfffffff9,
> +       .flags = IORESOURCE_MEM,
> +};
>  static const struct platform_device_info test_bus_info = {
>         .name = "unittest-bus",
>  };
> @@ -795,6 +800,7 @@ static void __init of_unittest_platform_populate(void)
>         if (rc)
>                 return;
>         test_bus->dev.of_node = np;
> +       platform_device_add_resources(test_bus, &test_bus_res, 1);

A comment here as to the purpose of this would be useful.

Rob

>
>         of_platform_populate(np, match, NULL, &test_bus->dev);
>         for_each_child_of_node(np, child) {
> --
> 2.1.4
>
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