Re: [patch] ACPI / CPPC: set an error code on probe error path

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On Wed, Nov 30, 2016 at 10:53:55PM +0100, Rafael J. Wysocki wrote:
> On Wed, Nov 30, 2016 at 8:22 PM, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
> > We should return -EINVAL if get_cpu_device() fails.
> >
> > Fixes: 158c998ea44b ("ACPI / CPPC: add sysfs support to compute delivered performance")
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> >
> > diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> > index d0d0504..e0ea8f5 100644
> > --- a/drivers/acpi/cppc_acpi.c
> > +++ b/drivers/acpi/cppc_acpi.c
> > @@ -784,8 +784,10 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
> >
> >         /* Add per logical CPU nodes for reading its feedback counters. */
> >         cpu_dev = get_cpu_device(pr->id);
> > -       if (!cpu_dev)
> > +       if (!cpu_dev) {
> > +               ret = -EINVAL;
> 
> ret is initialized here AFAICS.
> 
> Do you that its value is not the right one?

I'm looking at linux-next.  It's set to zero but we presumably want to
return an error code.

regards,
dan carpenter

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