From: Vinod Koul <vkoul@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: dmaengine <dmaengine@vger.kernel.org>,
Vaibhav Gupta <vaibhav.varodek@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Dan Williams <dan.j.williams@intel.com>,
linux-kernel-mentees@lists.linuxfoundation.org
Subject: Re: [Linux-kernel-mentees] [PATCH v1] dmaengine: pch_dma: use generic power management
Date: Mon, 17 Aug 2020 10:24:18 +0530 [thread overview]
Message-ID: <20200817045418.GC2639@vkoul-mobl> (raw)
In-Reply-To: <CAHp75VesTCOffxiy6=HG=g2t4=js3SnTm4LcdrgAGYiNvSS65Q@mail.gmail.com>
On 27-07-20, 14:19, Andy Shevchenko wrote:
> On Mon, Jul 27, 2020 at 1:16 PM Vinod Koul <vkoul@kernel.org> wrote:
> > On 20-07-20, 17:07, Vaibhav Gupta wrote:
> > > Drivers using legacy PM have to manage PCI states and device's PM states
> > > themselves. They also need to take care of configuration registers.
> > >
> > > With improved and powerful support of generic PM, PCI Core takes care of
> > > above mentioned, device-independent, jobs.
> > >
> > > This driver makes use of PCI helper functions like
> > > pci_save/restore_state(), pci_enable/disable_device(),
> > > and pci_set_power_state() to do required operations. In generic mode, they
> > > are no longer needed.
> > >
> > > Change function parameter in both .suspend() and .resume() to
> > > "struct device*" type. Use dev_get_drvdata() to get drv data.
> >
> > You are doing too many things in One patch. Do consider splitting them
> > up to a change per patch. for example using __maybe could be one patch,
> > removing code is suspend-resume callbacks would be other one.
>
> Vinod, while I completely agree with you in general, in this case it
> would make more unnecessary churn and will be rather unhelpful in all
> ways: for the contributor to do this work, for the reader to collect
> all the pieces. It also will be a bisectability issue, because the
> #ifdeffery replacement (IIRC you need to move from CONFIG_PM to
> CONFIG_PM_SLEEP). I really don't see any advantages of the splitting
> here.
>
> > > Compile-tested only.
> >
> > I would like to see some testing before we merge this
>
> I have hardware to test (Intel Minnowboard v1) but have no time. And
> taking into account that I did similar changes for many other drivers,
> I can give my
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> and take responsibility if somebody complains in the future (I don't
> believe it will be one).
>
> P.S. Another scenario if Vaibhav can find that board (there were
> dozens of thousands at least produced and floating on the second hand
> market) and test himself. It may be good since he touches the full lot
> of PCH (EGT20) drivers.
Applied now, thanks
--
~Vinod
_______________________________________________
Linux-kernel-mentees mailing list
Linux-kernel-mentees@lists.linuxfoundation.org
https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees
prev parent reply other threads:[~2020-08-17 4:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-20 11:37 [Linux-kernel-mentees] [PATCH v1] dmaengine: pch_dma: use generic power management Vaibhav Gupta
2020-07-27 8:56 ` Vinod Koul
2020-07-27 10:25 ` Vaibhav Gupta
2020-07-27 11:19 ` Andy Shevchenko
2020-07-27 13:08 ` Vaibhav Gupta
2020-08-17 4:54 ` Vinod Koul [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200817045418.GC2639@vkoul-mobl \
--to=vkoul@kernel.org \
--cc=andy.shevchenko@gmail.com \
--cc=bhelgaas@google.com \
--cc=dan.j.williams@intel.com \
--cc=dmaengine@vger.kernel.org \
--cc=helgaas@kernel.org \
--cc=linux-kernel-mentees@lists.linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=vaibhav.varodek@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).