Re: [PATCH v1 1/4] ACPI / bus: Remove checks in acpi_get_match_data()

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Thu, 2018-02-01 at 08:27 +0100, Rafael J. Wysocki wrote:
> On Wed, Jan 31, 2018 at 11:17 PM, Sinan Kaya <okaya@codeaurora.org>
> wrote:
> > On 1/31/2018 4:29 PM, Andy Shevchenko wrote:
> > > As well as its sibling of_device_get_match_data() has no such
> > > checks,
> > > no need to do it in acpi_get_match_data().
> > > 
> > > First of all, we are not supposed to call fwnode API like this
> > > without
> > > driver attached.
> > > 
> > > Second, if pure OF driver calls this function, it's weird to have
> > > ACPI
> > > companion without ACPI ID in this case.
> > 
> > We talked about this during review.
> > 
> > of_match_device() does all the checking for the OF part. ACPI
> > doesn't have
> > any checks.
> 
> Yeah, this patch is just plain incorrect AFAICS.

I don't see how check dev->driver is implemented on OF side then


of_device_get_match_data() which is called by
of_fwnode_device_get_match_data() has dereferenced dev->driver w/o any
check.

I can't agree that the patch is plain incorrect, if I didn't miss
anything.

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy