linux-kernel - RE: [PATCH 1/1] uio: clean uioinfo when uninstall uio driver

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Date:	Wed, 6 Apr 2011 06:11:31 +0000
From:	Dong Aisheng-B29396 <B29396@...escale.com>
To:	"Hans J. Koch" <hjk@...sjkoch.de>
CC:	"greg@...ah.com" <greg@...ah.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Zhou Jie-B30303 <B30303@...escale.com>
Subject: RE: [PATCH 1/1] uio: clean uioinfo when uninstall uio driver

> -----Original Message-----
> From: Hans J. Koch [mailto:hjk@...sjkoch.de]
> Sent: Tuesday, April 05, 2011 1:16 AM
> To: Dong Aisheng-B29396
> Cc: hjk@...sjkoch.de; greg@...ah.com; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH 1/1] uio: clean uioinfo when uninstall uio driver
> 
> On Sat, Apr 02, 2011 at 04:55:23PM +0800, Aisheng Dong wrote:
> > From: Jie Zhou <b30303@...escale.com>
> >
> > The uioinfo should be cleaned up when uninstall, otherwise re-install
> > failure of uio_pdrv_genirq.ko will happen.
> >
> > Signed-off-by: Jie Zhou <b30303@...escale.com>
> > Signed-off-by: Aisheng Dong <b29396@...escale.com>
> > ---
> >  drivers/uio/uio_pdrv_genirq.c |    6 ++++++
> >  1 files changed, 6 insertions(+), 0 deletions(-)
> >
> > diff --git a/drivers/uio/uio_pdrv_genirq.c
> > b/drivers/uio/uio_pdrv_genirq.c index 7174d51..e669a2c 100644
> > --- a/drivers/uio/uio_pdrv_genirq.c
> > +++ b/drivers/uio/uio_pdrv_genirq.c
> > @@ -189,6 +189,12 @@ static int uio_pdrv_genirq_remove(struct
> > platform_device *pdev)
> >
> >  	uio_unregister_device(priv->uioinfo);
> >  	pm_runtime_disable(&pdev->dev);
> > +
> > +	priv->uioinfo->irq_flags = 0;
> 
> Why this one?
Could be removed.

> > +	priv->uioinfo->handler = NULL;
> > +	priv->uioinfo->irqcontrol = NULL;
> 
> Both OK, good catch!
> 
> > +	priv->uioinfo->priv = NULL;
> 
> Why this one?
Could be removed.

Thanks for the info.
The V2 patch will be soon.

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