From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Vaibhav Gupta <vaibhav.varodek@gmail.com>
Cc: Vaibhav Gupta <vaibhavgupta40@gmail.com>,
Bjorn Helgaas <helgaas@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
bjorn@helgaas.com, "David S. Miller" <davem@davemloft.net>,
linux-kernel@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org,
skhan@linuxfoundation.org, linux-ide@vger.kernel.org
Subject: Re: [PATCH v3 0/3] drivers: ide: use generic power management
Date: Tue, 14 Jul 2020 10:19:06 +0200 [thread overview]
Message-ID: <834eb293-bd4f-626c-4558-fbf71a5999f0@samsung.com> (raw)
In-Reply-To: <20200714075247.GA4859@gmail.com>
On 7/14/20 9:52 AM, Vaibhav Gupta wrote:
> On Tue, Jul 14, 2020 at 09:32:56AM +0200, Bartlomiej Zolnierkiewicz wrote:
>>
>> Hi,
>>
>> On 7/13/20 7:36 PM, Vaibhav Gupta wrote:
>>> Linux Kernel Mentee: Remove Legacy Power Management.
>>>
>>> The purpose of this patch series is to remove legacy power management callbacks
>>> from ide drivers.
>>>
>>> The suspend() and resume() callbacks operations are still invoking
>>> pci_save/restore_state(), pci_set_power_state(), pci_enable/disable_state(),
>>> etc. and handling the power management themselves, which is not recommended.
>>>
>>> The conversion requires the removal of the those function calls and change the
>>> callback definition accordingly and make use of dev_pm_ops structure.
>>
>> IDE subsystem (drivers/ide/) is deprecated and has been superseded by libata
>> subsystem (drivers/ata/).
>>
>> libata drivers have the same issue so please concentrate on fixing them
>> first. Later (if desirable) changes can be back-ported to drivers/ide/.
>>
> Hello, (drivers/ide) and (drivers/ata) are the two major families, I am working
> on, for generic PM upgradation. I was bit unaware about priority, and also in
> the last, both ide and ata drivers have to be upgraded.
Well, drivers/ide/ is scheduled for removal in 2021
(it even prints the warning during initialization of
every host driver)..
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
>>> All patches are compile-tested only.
>>
>> This patchset needs (at least) some basic testing. It should be easier with
>> libata subsystem as it also support SATA controllers and devices.
> To upgrade PM in (drivers/ide) I have made .suspend() and .resume() static. Then
> bind them in "struct dev_pm_ops" variable (ide_pci_pm_ops) and expose it using
> EXPORT_SYMBOL_GPL(). This has affected 30 drivers. I was hoping if ide changes
> can be tested/verified, specially [PATCH 1/3]. As then, I will be sure about
> similar change in ata, as it also requires similar alteration.
>
> Thanks
> Vaibhav Gupta
>
>>
>> Best regards,
>> --
>> Bartlomiej Zolnierkiewicz
>> Samsung R&D Institute Poland
>> Samsung Electronics
>>
>>> v3:
>>> - Modpost error for undefined reference by Kbuild in v1.
>>> - Another approach to disable PM in drivers/ide/triflex.c suggested by
>>> Bjorn Helgaas in v2.
>>>
>>> Test tools:
>>> - Compiler: gcc (GCC) 10.1.0
>>> - allmodconfig build: make -j$(nproc) W=1 all
>>>
>>> Vaibhav Gupta (3):
>>> ide: use generic power management
>>> ide: sc1200: use generic power management
>>> ide: delkin_cb: use generic power management
>>>
>>> drivers/ide/aec62xx.c | 3 +--
>>> drivers/ide/alim15x3.c | 3 +--
>>> drivers/ide/amd74xx.c | 3 +--
>>> drivers/ide/atiixp.c | 3 +--
>>> drivers/ide/cmd64x.c | 3 +--
>>> drivers/ide/cs5520.c | 3 +--
>>> drivers/ide/cs5530.c | 3 +--
>>> drivers/ide/cs5535.c | 3 +--
>>> drivers/ide/cs5536.c | 3 +--
>>> drivers/ide/cy82c693.c | 3 +--
>>> drivers/ide/delkin_cb.c | 32 +++++---------------------
>>> drivers/ide/hpt366.c | 3 +--
>>> drivers/ide/ide-pci-generic.c | 3 +--
>>> drivers/ide/it8172.c | 3 +--
>>> drivers/ide/it8213.c | 3 +--
>>> drivers/ide/it821x.c | 3 +--
>>> drivers/ide/jmicron.c | 3 +--
>>> drivers/ide/ns87415.c | 3 +--
>>> drivers/ide/opti621.c | 3 +--
>>> drivers/ide/pdc202xx_new.c | 3 +--
>>> drivers/ide/pdc202xx_old.c | 3 +--
>>> drivers/ide/piix.c | 3 +--
>>> drivers/ide/sc1200.c | 43 ++++++++++++-----------------------
>>> drivers/ide/serverworks.c | 3 +--
>>> drivers/ide/setup-pci.c | 29 +++++------------------
>>> drivers/ide/siimage.c | 3 +--
>>> drivers/ide/sis5513.c | 3 +--
>>> drivers/ide/sl82c105.c | 3 +--
>>> drivers/ide/slc90e66.c | 3 +--
>>> drivers/ide/triflex.c | 24 +++++++------------
>>> drivers/ide/via82cxxx.c | 3 +--
>>> include/linux/ide.h | 8 +------
>>> 32 files changed, 62 insertions(+), 155 deletions(-)
>>>
>>
>
>
next prev parent reply other threads:[~2020-07-14 8:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 17:36 [PATCH v3 0/3] drivers: ide: use generic power management Vaibhav Gupta
2020-07-13 17:36 ` [PATCH v3 1/3] " Vaibhav Gupta
2020-07-13 17:36 ` [PATCH v3 2/3] ide: sc1200: " Vaibhav Gupta
2020-07-13 17:36 ` [PATCH v3 3/3] ide: delkin_cb: " Vaibhav Gupta
[not found] ` <CGME20200714073256eucas1p13ebe9585c29b766e48506400ba91a8ed@eucas1p1.samsung.com>
2020-07-14 7:32 ` [PATCH v3 0/3] drivers: ide: " Bartlomiej Zolnierkiewicz
2020-07-14 7:52 ` Vaibhav Gupta
2020-07-14 8:19 ` Bartlomiej Zolnierkiewicz [this message]
2020-07-14 8:24 ` Vaibhav Gupta
2020-08-04 1:49 ` David Miller
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=834eb293-bd4f-626c-4558-fbf71a5999f0@samsung.com \
--to=b.zolnierkie@samsung.com \
--cc=bhelgaas@google.com \
--cc=bjorn@helgaas.com \
--cc=davem@davemloft.net \
--cc=helgaas@kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel-mentees@lists.linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=skhan@linuxfoundation.org \
--cc=vaibhav.varodek@gmail.com \
--cc=vaibhavgupta40@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).