From: okaya@codeaurora.org
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
dmaengine <dmaengine@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Vinod Koul <vinod.koul@intel.com>,
dmaengine-owner@vger.kernel.org
Subject: Re: [PATCH v1 1/4] ACPI / bus: Remove checks in acpi_get_match_data()
Date: Thu, 01 Feb 2018 07:58:07 -0500 [thread overview]
Message-ID: <0858321da222e203fe71269df6b384b9@codeaurora.org> (raw)
In-Reply-To: <1517487893.7000.1372.camel@linux.intel.com>
On 2018-02-01 07:24, Andy Shevchenko wrote:
> 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.
Sorry, i should have been more specific. I was talkimg about match_data
not driver.
I agree that driver check is redundant.
next prev parent reply other threads:[~2018-02-01 12:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-31 21:29 [PATCH v1 1/4] ACPI / bus: Remove checks in acpi_get_match_data() Andy Shevchenko
2018-01-31 21:29 ` [PATCH v1 2/4] ACPI / bus: Rename acpi_get_match_data() to acpi_device_get_match_data() Andy Shevchenko
2018-01-31 21:29 ` [PATCH v1 3/4] dmaengine: hidma: Constify returned by device_get_match_data() value Andy Shevchenko
2018-02-03 17:16 ` kbuild test robot
2018-01-31 21:29 ` [PATCH v1 4/4] device property: Constify device_get_match_data() Andy Shevchenko
2018-01-31 22:17 ` [PATCH v1 1/4] ACPI / bus: Remove checks in acpi_get_match_data() Sinan Kaya
2018-02-01 7:27 ` Rafael J. Wysocki
2018-02-01 12:24 ` Andy Shevchenko
2018-02-01 12:58 ` okaya [this message]
2018-02-02 11:32 ` Rafael J. Wysocki
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