netdev - Re: [PATCH v1 04/11] ena_netdev: use generic power management

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Message-ID: <20200701085805.4dac84fb@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 1 Jul 2020 08:58:05 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vaibhav Gupta <vaibhavgupta40@...il.com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>, bjorn@...gaas.com,
        Vaibhav Gupta <vaibhav.varodek@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        David Dillow <dave@...dillows.org>,
        Ion Badulescu <ionut@...ula.org>,
        Netanel Belgazal <netanel@...zon.com>,
        Arthur Kiyanovski <akiyano@...zon.com>,
        Guy Tzalik <gtzalik@...zon.com>,
        Saeed Bishara <saeedb@...zon.com>,
        Zorik Machulsky <zorik@...zon.com>,
        Derek Chickles <dchickles@...vell.com>,
        Satanand Burla <sburla@...vell.com>,
        Felix Manlunas <fmanlunas@...vell.com>,
        Denis Kirjanov <kda@...ux-powerpc.org>,
        Ajit Khaparde <ajit.khaparde@...adcom.com>,
        Sriharsha Basavapatna <sriharsha.basavapatna@...adcom.com>,
        Somnath Kotur <somnath.kotur@...adcom.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Jon Mason <jdmason@...zu.us>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        skhan@...uxfoundation.org
Subject: Re: [PATCH v1 04/11] ena_netdev: use generic power management

On Wed,  1 Jul 2020 18:29:31 +0530 Vaibhav Gupta wrote:
> With legacy PM, drivers themselves were responsible for managing the
> device's power states and takes care of register states.
> 
> After upgrading to the generic structure, PCI core will take care of
> required tasks and drivers should do only device-specific operations.
> 
> Compile-tested only.
> 
> Signed-off-by: Vaibhav Gupta <vaibhavgupta40@...il.com>

This one produces a warning on a W=1 build:

drivers/net/ethernet/amazon/ena/ena_netdev.c:4464:26: warning: ‘ena_pm_ops’ defined but not used [-Wunused-const-variable=]
  4464 | static SIMPLE_DEV_PM_OPS(ena_pm_ops, ena_suspend, ena_resume);