Re: [RESEND PATCH] x86: return proper error code
From: Pekka Paalanen
Date: Fri Oct 01 2010 - 10:28:37 EST
On Thu, 30 Sep 2010 22:49:36 +0300
Pekka Enberg <penberg@xxxxxxxxxx> wrote:
> On Thu, Sep 30, 2010 at 10:43 PM, Davidlohr Bueso <dave@xxxxxxx>
> wrote:
> > x86: return -ENOMEM instead of -1 when returning on memory
> > allocation errors in add_kmmio_fault_page()
> >
> > Signed-off-by: Davidlohr Bueso <dave@xxxxxxx>
> > ---
> > arch/x86/mm/kmmio.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
> > index e5d5e2c..36a4347 100644
> > --- a/arch/x86/mm/kmmio.c
> > +++ b/arch/x86/mm/kmmio.c
> > @@ -370,7 +370,7 @@ static int add_kmmio_fault_page(unsigned
> > long page)
> >
> > f = kzalloc(sizeof(*f), GFP_ATOMIC);
> > if (!f)
> > - return -1;
> > + return -ENOMEM;
> >
> > f->count = 1;
> > f->page = page;
>
> This doesn't matter much as register_kmmio_probe() doesn't do
> anything sane with the error code and ioremap_trace_core()
> ignores what register_mmio_probe() does completely. I'd either
> keep the code as-is or try to fix up the fishy error handling
> properly.
Yes, I agree completely with Pekka.
--
Pekka Paalanen
http://www.iki.fi/pq/
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