From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Bjorn Helgaas <bhelgaas@google.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
Yinghai Lu <yinghai@kernel.org>,
john.ronciak@intel.com, miles.j.penner@intel.com,
bruce.w.allan@intel.com,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH 5/6] PCI: acpiphp: look _RMV method a bit deeper in the hierarhcy
Date: Tue, 25 Jun 2013 21:31:52 +0300 [thread overview]
Message-ID: <CAHp75Vc8BauuBJcfqBzu_+6nUwEC-uD3z_RF5gT-3YhV0fjTqw@mail.gmail.com> (raw)
In-Reply-To: <20130625183123.GJ9294@intel.com>
On Tue, Jun 25, 2013 at 9:31 PM, Mika Westerberg
<mika.westerberg@linux.intel.com> wrote:
> On Tue, Jun 25, 2013 at 09:15:47PM +0300, Andy Shevchenko wrote:
>> On Tue, Jun 25, 2013 at 7:22 PM, Mika Westerberg
>> <mika.westerberg@linux.intel.com> wrote:
[]
>> > +static acpi_status pcihp_evaluate_rmv(acpi_handle handle, u32 lvl,
>> > + void *context, void **return_not_used)
>> > +{
>> > + unsigned long long *removable = context;
>> > + unsigned long long value;
>> > + acpi_status status;
>> > +
>> > + status = acpi_evaluate_integer(handle, "_RMV", NULL, &value);
>> > + if (ACPI_SUCCESS(status) && value) {
>>
>> So, there is a chance the caller gets back uninitialized *context.
>> Let's assume that is by design.
>>
>> > + *removable = value;
>> > + return AE_CTRL_TERMINATE;
>> > + }
>> > + return AE_OK;
>> > +}
>>
>>
>> > +static bool pcihp_is_removable(acpi_handle handle, size_t depth)
>> > +{
>> > + unsigned long long removable = 0;
>> > + acpi_status status;
>> > +
>> > + status = pcihp_evaluate_rmv(handle, 0, &removable, NULL);
>> > + if ((status == AE_CTRL_TERMINATE) && removable)
>>
>> Here you already have removable not equal zero.
>
> Hmm, removable is initialized to zero just few lines above... Did I miss
> something obvious?
Yes, that's correct, however, you already did this check when you call
evaluate_rmv. Thus, second check '&& removable' is not needed.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2013-06-25 18:31 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-25 16:22 [PATCH 0/6] Thunderbolt workarounds take 2 Mika Westerberg
2013-06-25 16:22 ` [PATCH 1/6] PCI: acpiphp: do not check for SLOT_ENABLED in enable_device() Mika Westerberg
2013-06-26 23:28 ` Bjorn Helgaas
2013-06-27 13:25 ` Kirill A. Shutemov
2013-06-28 9:51 ` Kirill A. Shutemov
2013-06-28 17:00 ` Bjorn Helgaas
2013-06-28 18:54 ` Rafael J. Wysocki
2013-07-01 9:32 ` Mika Westerberg
2013-07-01 14:01 ` Rafael J. Wysocki
2013-07-01 18:36 ` Mika Westerberg
2013-07-02 1:29 ` Rafael J. Wysocki
2013-07-02 16:40 ` Bjorn Helgaas
2013-07-02 20:29 ` Rafael J. Wysocki
2013-07-02 20:31 ` Mika Westerberg
2013-07-02 20:49 ` Rafael J. Wysocki
2013-06-25 16:22 ` [PATCH 2/6] PCI: acpiphp: enable_device(): rescan even if no new devices on slot Mika Westerberg
2013-06-26 23:37 ` Bjorn Helgaas
2013-06-27 13:02 ` Mika Westerberg
2013-06-27 16:32 ` Mika Westerberg
2013-06-27 16:50 ` Bjorn Helgaas
2013-06-27 16:54 ` Bjorn Helgaas
2013-06-27 1:20 ` Yinghai Lu
2013-06-27 13:04 ` Mika Westerberg
2013-06-25 16:22 ` [PATCH 3/6] PCI: introduce pci_trim_stale_devices() Mika Westerberg
2013-06-25 17:47 ` Andy Shevchenko
2013-06-25 17:56 ` Kirill A. Shutemov
2013-06-28 19:59 ` Rafael J. Wysocki
2013-06-25 16:22 ` [PATCH 4/6] PCI: acpiphp: check for new devices on enabled host Mika Westerberg
2013-06-25 18:04 ` Andy Shevchenko
2013-06-26 9:39 ` Kirill A. Shutemov
2013-06-27 19:05 ` Yinghai Lu
2013-06-28 9:33 ` Kirill A. Shutemov
2013-06-28 16:22 ` Yinghai Lu
2013-06-28 20:04 ` Rafael J. Wysocki
2013-06-25 16:22 ` [PATCH 5/6] PCI: acpiphp: look _RMV method a bit deeper in the hierarhcy Mika Westerberg
2013-06-25 18:15 ` Andy Shevchenko
2013-06-25 18:31 ` Mika Westerberg
2013-06-25 18:31 ` Andy Shevchenko [this message]
2013-06-25 18:51 ` Mika Westerberg
2013-06-25 19:30 ` Andy Shevchenko
2013-07-02 10:44 ` Kirill A. Shutemov
2013-07-02 17:09 ` Bjorn Helgaas
2013-07-02 17:45 ` Kirill A. Shutemov
2013-07-02 20:48 ` Rafael J. Wysocki
2013-07-02 20:40 ` Rafael J. Wysocki
2013-06-25 16:22 ` [PATCH 6/6] x86/PCI: quirk Thunderbolt PCI-to-PCI bridges Mika Westerberg
2013-06-25 21:15 ` Jesse Barnes
2013-06-26 12:17 ` Mika Westerberg
2013-06-26 15:04 ` Greg Kroah-Hartman
2013-06-26 20:59 ` Bjorn Helgaas
2013-06-26 22:15 ` Alex Williamson
2013-06-27 13:09 ` Mika Westerberg
2013-06-26 22:18 ` Bjorn Helgaas
2013-06-26 22:26 ` Yinghai Lu
2013-06-26 22:31 ` Yinghai Lu
2013-06-26 22:44 ` Rafael J. Wysocki
2013-06-26 22:38 ` Yinghai Lu
2013-06-26 22:55 ` Bjorn Helgaas
2013-06-26 23:56 ` Yinghai Lu
2013-06-27 16:00 ` Bjorn Helgaas
2013-06-27 17:27 ` Yinghai Lu
2013-06-27 13:58 ` Mika Westerberg
2013-06-27 13:54 ` Mika Westerberg
2013-06-27 16:27 ` Mika Westerberg
2013-06-27 17:18 ` Yinghai Lu
2013-06-25 23:24 ` [PATCH 0/6] Thunderbolt workarounds take 2 Rafael J. Wysocki
2013-06-26 7:25 ` Mika Westerberg
2013-06-26 12:45 ` Rafael J. Wysocki
2013-06-26 19:48 ` Bjorn Helgaas
2013-06-26 20:01 ` Rafael J. Wysocki
2013-06-26 19:55 ` Bjorn Helgaas
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