linux-kernel - Re: [PATCH] OSS: fix error return in dma

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Message-ID: <s5h639f1p0e.wl%tiwai@suse.de>
Date:	Thu, 12 Nov 2009 21:12:17 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH]  OSS: fix error return in dma_ioctl()

At Thu, 12 Nov 2009 18:04:53 +0100,
I wrote:
> 
> At Thu, 12 Nov 2009 17:43:11 +0100,
> Roel Kluin wrote:
> > 
> > The returned error should stay negative
> > 
> > Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> > ---
> >  sound/oss/audio.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> > 
> > diff --git a/sound/oss/audio.c b/sound/oss/audio.c
> > index b69c05b..7df48a2 100644
> > --- a/sound/oss/audio.c
> > +++ b/sound/oss/audio.c
> > @@ -838,7 +838,7 @@ static int dma_ioctl(int dev, unsigned int cmd, void __user *arg)
> >  					if ((err = audio_devs[dev]->d->prepare_for_input(dev,
> >  						     dmap_in->fragment_size, dmap_in->nbufs)) < 0) {
> >  						spin_unlock_irqrestore(&dmap_in->lock,flags);
> > -						return -err;
> > +						return err;
> 
> Hmm, looks like a wrong fix to me.
> Here, err itself is already negative, so you don't need to flip the
> sign.

My bad, I looked at the patch in a reverse way.
Now applied.  Thanks!


Takashi
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