linux-kernel - Re: [PATCH] usb-hid-core: Set intfdata to NULL if probe fails

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Message-ID: <alpine.LNX.2.00.1205230000070.30445@pobox.suse.cz>
Date:	Wed, 23 May 2012 00:00:37 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Hans de Goede <hdegoede@...hat.com>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] usb-hid-core: Set intfdata to NULL if probe fails

On Tue, 22 May 2012, Hans de Goede wrote:

> Well then lets work towards making it guaranteed, since I still believe
> the following holds true:
> 1) drvdata is for a driver to store a pointer to driver specific data
> 2) If no driver is bound, there is no driver specific data associated with
>    the device
> 3) Thus logically drvdata should be NULL if no driver is bound.
> 
> I'll do a patch for the USB-core to ensure that intfdata gets set to NULL
> on probe failure.

Hans,

I believe this is a good thing per se, but shouldn't this rather be done 
in driver core, to guarantee that this hold across all buses?

Thanks,

-- 
Jiri Kosina
SUSE Labs
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