linux-kernel - Re: [RFC PATCH pdx86-platform-drivers-x86] platform/x86: thinkpad_acpi: quirk_btusb

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Date:   Fri, 6 May 2022 13:07:43 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Limonciello, Mario" <Mario.Limonciello@....com>,
        kernel test robot <lkp@...el.com>
Cc:     "kbuild-all@...ts.01.org" <kbuild-all@...ts.01.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH pdx86-platform-drivers-x86] platform/x86:
 thinkpad_acpi: quirk_btusb_bug can be static

Hi,

On 5/6/22 12:09, Hans de Goede wrote:
> Hi,
> 
> On 5/3/22 15:07, Limonciello, Mario wrote:
>> [Public]
>>
>>
>>
>>> -----Original Message-----
>>> From: kernel test robot <lkp@...el.com>
>>> Sent: Tuesday, May 3, 2022 06:18
>>> To: Limonciello, Mario <Mario.Limonciello@....com>
>>> Cc: kbuild-all@...ts.01.org; Andy Shevchenko
>>> <andriy.shevchenko@...ux.intel.com>; Hans de Goede
>>> <hdegoede@...hat.com>; linux-kernel@...r.kernel.org
>>> Subject: [RFC PATCH pdx86-platform-drivers-x86] platform/x86:
>>> thinkpad_acpi: quirk_btusb_bug can be static
>>>
>>> drivers/platform/x86/thinkpad_acpi.c:317:20: warning: symbol
>>> 'quirk_btusb_bug' was not declared. Should it be static?
>>>
>>> Fixes: 25eecc2ff6cc ("platform/x86: thinkpad_acpi: Convert btusb DMI list to
>>> quirks")
>>> Reported-by: kernel test robot <lkp@...el.com>
>>> Signed-off-by: kernel test robot <lkp@...el.com>
>>
>> Reviewed-by: Mario Limonciello <mario.limonciello@....com>
> 
> Thanks, since the original patch was still in my review-hans
> branch (and not yet in for-next) I've squashed this fix into
> the original patch.

I've just realized there is another issue with this
("platform/x86: thinkpad_acpi: Convert btusb DMI list to quirks")

Patch, it only sets tp_features.quirks after bluetooth_init()
has already run, so the:

	if (tp_features.quirks && tp_features.quirks->btusb_bug && ...

check will never be true since tp_features.quirks is being set
too late.

I'll squash in a change moving the:

        dmi_id = dmi_first_match(fwbug_list);
        if (dmi_id)
                tp_features.quirks = dmi_id->driver_data;

to higher inside thinkpad_acpi_module_init() to fix this,
while keeping the:

#ifdef CONFIG_SUSPEND
       if (tp_features.quirks && tp_features.quirks->s2idle_bug_mmio) {
               if (!acpi_register_lps0_dev(&thinkpad_acpi_s2idle_dev_ops))
                       pr_info("Using s2idle quirk to avoid %s platform firmware bug\n",
                               (dmi_id && dmi_id->ident) ? dmi_id->ident : "");
       }
#endif

block at then end of thinkpad_acpi_module_init() so as to not change
the ordering wrt registering the lps0_dev.

Regards,

Hans





> 
> Regards,
> 
> Hans
> 
> 
> 
> 
> 
>>
>>> ---
>>>  drivers/platform/x86/thinkpad_acpi.c |    2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/platform/x86/thinkpad_acpi.c
>>> b/drivers/platform/x86/thinkpad_acpi.c
>>> index aed17d32ed84b..eefa22e86ae10 100644
>>> --- a/drivers/platform/x86/thinkpad_acpi.c
>>> +++ b/drivers/platform/x86/thinkpad_acpi.c
>>> @@ -314,7 +314,7 @@ struct quirk_entry {
>>>  	bool btusb_bug;
>>>  };
>>>
>>> -struct quirk_entry quirk_btusb_bug = {
>>> +static struct quirk_entry quirk_btusb_bug = {
>>>  	.btusb_bug = true,
>>>  };
>>>
>>