Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates
 216.228.112.34 as permitted sender) receiver=protection.outlook.com;
 client-ip=216.228.112.34; helo=mail.nvidia.com;
Subject: Re: [PATCH v10 2/8] PCI: Add new array for keeping track of ordering
 of reset methods
To:     Bjorn Helgaas <helgaas@kernel.org>,
        Amey Narkhede <ameynarkhede03@gmail.com>
CC:     Bjorn Helgaas <bhelgaas@google.com>, <alex.williamson@redhat.com>,
        Raphael Norwitz <raphael.norwitz@nutanix.com>,
        <linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <kw@linux.com>, Sinan Kaya <okaya@kernel.org>,
        Len Brown <lenb@kernel.org>,
        "Rafael J . Wysocki" <rjw@rjwysocki.net>
References: <20210727225951.GA752728@bjorn-Precision-5520>
From:   Shanker R Donthineni <sdonthineni@nvidia.com>
Message-ID: <f89b5c62-56d5-3437-f8e7-24c5d74a7afa@nvidia.com>
Date:   Wed, 28 Jul 2021 13:31:19 -0500
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <20210727225951.GA752728@bjorn-Precision-5520>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Content-Language: en-US
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jul 2021 18:31:22.9478
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 9e309b89-27ec-4746-3f17-08d951f5e6d3
X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com]
X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT058.eop-nam11.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB5523
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi Bjorn,

On 7/27/21 5:59 PM, Bjorn Helgaas wrote:
>> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
>> index fefa6d7b3..42440cb10 100644
>> --- a/drivers/pci/pci.c
>> +++ b/drivers/pci/pci.c
>> @@ -72,6 +72,14 @@ static void pci_dev_d3_sleep(struct pci_dev *dev)
>>               msleep(delay);
>>  }
>>
>> +int pci_reset_supported(struct pci_dev *dev)
>> +{
>> +     u8 null_reset_methods[PCI_NUM_RESET_METHODS] = { 0 };
>> +
>> +     return memcmp(null_reset_methods,
>> +                   dev->reset_methods, sizeof(null_reset_methods));
> I think "return dev->reset_methods[0] != 0;" is sufficient, isn't it?
>

Agree with you, it simplifies code logic and can be moved to "include/linux/pci.h"
with inline definition. Can we change return type to 'bool' instead of 'int' ?

static inline bool pci_reset_supported(struct pci_dev *dev)
{  
    return !!dev->reset_methods[0];
}