linux-kernel - Re: [PATCH 2/2 v2] of/platform: Use platform

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 21 Apr 2015 15:13:33 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Cc:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Jakub Sitnicki <jsitnicki@...il.com>,
	Mike Travis <travis@....com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Thierry Reding <treding@...dia.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2 v2] of/platform: Use platform_device interface

On Tue, Apr 21, 2015 at 3:25 AM, Ricardo Ribalda Delgado
<ricardo.ribalda@...il.com> wrote:
> of_platform_device_create_pdata() was using of_device_add() to create
> the devices, but of_platform_device_destroy was using
> of_platform_device_destroy().
>
> of_device_add(), do not call insert_resource(), which initializes the
> parent field of the resource structure, needed by release_resource(),
> called by of_platform_device_destroy().

This is because some DTs have overlapping resources and doing this
would break things. If you look at the git history, this was fixed and
then reverted by Grant.

Rob

> This leads to a NULL pointer deference.
>
> This patch, replaces of_device_add() with platform_device_data().
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> ---
>  drivers/of/platform.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index a01f57c..f011f57 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -183,8 +183,9 @@ static struct platform_device *of_platform_device_create_pdata(
>         dev->dev.bus = &platform_bus_type;
>         dev->dev.platform_data = platform_data;
>         of_dma_configure(&dev->dev, dev->dev.of_node);
> +       dev->name = dev_name(&dev->dev);
>
> -       if (of_device_add(dev) != 0) {
> +       if (platform_device_add(dev) != 0) {
>                 of_dma_deconfigure(&dev->dev);
>                 platform_device_put(dev);
>                 goto err_clear_flag;
> --
> 2.1.4
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/