linux-kernel - Re: [PATCH] driver core: fix device

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Message-ID: <CANq1E4TcjmcPbj2GvgUcXA7_+AaevbMTC6+2CsbrugJjjC755A@mail.gmail.com>
Date:	Sun, 8 Dec 2013 15:42:33 +0100
From:	David Herrmann <dh.herrmann@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Herrmann <dh.herrmann@...il.com>
Subject: Re: [PATCH] driver core: fix device_create() error path

Hi Greg

Ping?

Thanks
David

On Thu, Nov 21, 2013 at 8:15 PM, David Herrmann <dh.herrmann@...il.com> wrote:
> We call put_device() in the error path, which is fine for dev==NULL.
> However, in case kobject_set_name_vargs() fails, we have dev!=NULL but
> device_initialized() wasn't called, yet.
>
> Fix this by splitting device_register() into explicit calls to
> device_add() and an early call to device_initialize().
>
> Signed-off-by: David Herrmann <dh.herrmann@...il.com>
> ---
>  drivers/base/core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index 34abf4d..4be8911 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -1676,6 +1676,7 @@ device_create_groups_vargs(struct class *class, struct device *parent,
>                 goto error;
>         }
>
> +       device_initialize(dev);
>         dev->devt = devt;
>         dev->class = class;
>         dev->parent = parent;
> @@ -1687,7 +1688,7 @@ device_create_groups_vargs(struct class *class, struct device *parent,
>         if (retval)
>                 goto error;
>
> -       retval = device_register(dev);
> +       retval = device_add(dev);
>         if (retval)
>                 goto error;
>
> --
> 1.8.4.2
>
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