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Message-ID: <f9e67fe9-a93b-75ab-1fdb-87d3783fe5fc@loongson.cn>
Date:   Tue, 6 Jun 2023 10:06:15 +0800
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Subject: Re: [Intel-gfx] [PATCH v2 1/2] vgaarb: various coding style and
 comments fix
To:     Andi Shyti <andi.shyti@linux.intel.com>,
        Sui Jingfeng <15330273260@189.cn>
Cc:     Alex Deucher <alexander.deucher@amd.com>,
        Christian Konig <christian.koenig@amd.com>,
        Pan Xinhui <Xinhui.Pan@amd.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@intel.com>,
        Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
        Ben Skeggs <bskeggs@redhat.com>,
        Karol Herbst <kherbst@redhat.com>,
        Lyude Paul <lyude@redhat.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Hawking Zhang <Hawking.Zhang@amd.com>,
        Mario Limonciello <mario.limonciello@amd.com>,
        Lijo Lazar <lijo.lazar@amd.com>,
        YiPeng Chai <YiPeng.Chai@amd.com>,
        Andrey Grodzovsky <andrey.grodzovsky@amd.com>,
        Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>,
        Bokun Zhang <Bokun.Zhang@amd.com>,
        Ville Syrjala <ville.syrjala@linux.intel.com>,
        Li Yi <liyi@loongson.cn>, Jason Gunthorpe <jgg@ziepe.ca>,
        Kevin Tian <kevin.tian@intel.com>,
        Cornelia Huck <cohuck@redhat.com>,
        Yishai Hadas <yishaih@nvidia.com>,
        Abhishek Sahu <abhsahu@nvidia.com>,
        Yi Liu <yi.l.liu@intel.com>, kvm@vger.kernel.org,
        nouveau@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
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References: <20230604205831.3357596-1-15330273260@189.cn>
 <ZH5epG6rfTOWT6CS@ashyti-mobl2.lan>
Content-Language: en-US
From:   Sui Jingfeng <suijingfeng@loongson.cn>
Organization: Loongson
In-Reply-To: <ZH5epG6rfTOWT6CS@ashyti-mobl2.lan>
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Precedence: bulk

Hi,

On 2023/6/6 06:16, Andi Shyti wrote:
> Hi Sui,
>
> On Mon, Jun 05, 2023 at 04:58:30AM +0800, Sui Jingfeng wrote:
>> From: Sui Jingfeng <suijingfeng@loongson.cn>
>>
>> To keep consistent with vga_iostate_to_str() function, the third argument
>> of vga_str_to_iostate() function should be 'unsigned int *'.
> I think the real reason is not to keep consistent with
> vga_iostate_to_str() but because vga_str_to_iostate() is actually
> only taking "unsigned int *" parameters.

Yes, right.

my expression is not completely correct, I will update it at next version.


I think, we have the same opinion.

Originally, I also want to express the opinion.

Because, it make no sense to  interpret the return value

(VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM) as int type.


IO state should be should be donate by a unsigned type.

vga_iostate_to_str() also receive unsigned type.

static const char *vga_iostate_to_str(unsigned int iostate)

>> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
>> ---
>>   drivers/pci/vgaarb.c   | 29 +++++++++++++++--------------
>>   include/linux/vgaarb.h |  8 +++-----
>>   2 files changed, 18 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c
>> index 5a696078b382..e40e6e5e5f03 100644
>> --- a/drivers/pci/vgaarb.c
>> +++ b/drivers/pci/vgaarb.c
>> @@ -61,7 +61,6 @@ static bool vga_arbiter_used;
>>   static DEFINE_SPINLOCK(vga_lock);
>>   static DECLARE_WAIT_QUEUE_HEAD(vga_wait_queue);
>>   
>> -
> drop this change

OK,

This is a double blank line.

Originally, I intend to accumulate all tiny fix, commit together.

As they are trivial.

Now, Should I split this patch,

then this patch set will contain two trivial patch ?

>>   static const char *vga_iostate_to_str(unsigned int iostate)
>>   {
>>   	/* Ignore VGA_RSRC_IO and VGA_RSRC_MEM */
>> @@ -77,10 +76,12 @@ static const char *vga_iostate_to_str(unsigned int iostate)
>>   	return "none";
>>   }
>>   
>> -static int vga_str_to_iostate(char *buf, int str_size, int *io_state)
>> +static int vga_str_to_iostate(char *buf, int str_size, unsigned int *io_state)
> this is OK, it's actually what you are describing in the commit
> log, but...
>
>>   {
>> -	/* we could in theory hand out locks on IO and mem
>> -	 * separately to userspace but it can cause deadlocks */
>> +	/*
>> +	 * we could in theory hand out locks on IO and mem
>> +	 * separately to userspace but it can cause deadlocks
>> +	 */
> ... all the rest needs to go on different patches as it doesn't
> have anything to do with what you describe.

OK,

I will wait a few days for more reviews,

I process them together,   also avoid version grow too fast.

Thanks.

> Andi

-- 
Jingfeng