linux-kernel - Re: [GIT] HID updates for 2.6.29

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Date:	Wed, 7 Jan 2009 12:30:44 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Gabriel C <nix.or.die@...glemail.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT] HID updates for 2.6.29

Am Wednesday 07 January 2009 11:22:27 schrieb Jiri Kosina:
> On Wed, 7 Jan 2009, Gabriel C wrote:

> I believe this is caused by forgotten assignment in usb_register_dev() 
> error handling introduced in 079034073fa (added Oliver to CC).

Yes, it seem I caused this. Sorry.
  
> Commit 079034073fa ("HID: hiddev cleanup -- handle all error conditions
> properly") by mistake removed proper initialization of hid->hiddev pointer
> in hiddev_connect() in case usb_register_dev() succeeds for the hiddev node.
> Put it properly back in place.
> 
> Signed-off-by: Jiri Kosina <jkosina@...e.cz>
> ---
>  drivers/hid/usbhid/hiddev.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
> index 6a98f9f..1928e8a 100644
> --- a/drivers/hid/usbhid/hiddev.c
> +++ b/drivers/hid/usbhid/hiddev.c
> @@ -885,6 +885,7 @@ int hiddev_connect(struct hid_device *hid, unsigned int force)
>  	} else {
>  		hid->minor = usbhid->intf->minor;
>  		hiddev_table[usbhid->intf->minor - HIDDEV_MINOR_BASE] = hiddev;
> +		hid->hiddev = hiddev;

It seems to me that this is still a race condition. What prevents open()
from being called before this is set?

	Regards
		Oliver
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