linux-kernel - Re: [PATCH 1/4] UIO: hold a reference to the device's owner while the device is open

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Message-ID: <20080410211236.GA21251@suse.de>
Date:	Thu, 10 Apr 2008 14:12:36 -0700
From:	Greg KH <gregkh@...e.de>
To:	"Hans J. Koch" <hjk@...utronix.de>
Cc:	Uwe Kleine-K??nig <Uwe.Kleine-Koenig@...i.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] UIO: hold a reference to the device's owner while
	the device is open

On Thu, Apr 10, 2008 at 11:02:29PM +0200, Hans J. Koch wrote:
> On Thu, Apr 10, 2008 at 02:37:00PM +0200, Uwe Kleine-K??nig wrote:
> > Otherwise the device might just disappear while /dev/uioX is being used
> > which results in an Oops.
> 
> Hi Uwe,
> thanks for this one, good catch! Looks fine to me. There are some minor issues, see
> below.
> And I'd like to hear Greg's opinion: Do you agree we can omit
> try_module_get() in uio_mmap()?

If it's already been grabbed in the open() call, everything should be
safe, right?

thanks,

greg k-h
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