linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
To: Keith Busch <kbusch@kernel.org>
Cc: Koba Ko <koba.ko@canonical.com>, Christoph Hellwig <hch@lst.de>,
	Jens Axboe <axboe@fb.com>, Sagi Grimberg <sagi@grimberg.me>,
	linux-nvme <linux-nvme@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Henrik Juul Hansen <hjhansen2020@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Linux PCI <linux-pci@vger.kernel.org>
Subject: Re: [PATCH] nvme-pci: Avoid to go into d3cold if device can't use npss.
Date: Wed, 26 May 2021 20:11:41 +0800	[thread overview]
Message-ID: <CAAd53p7xabD2t__=t67uRLrrFOB7YGgr_GMhi6L48PFGhNe80w@mail.gmail.com> (raw)
In-Reply-To: <20210526024934.GB3704949@dhcp-10-100-145-180.wdc.com>

On Wed, May 26, 2021 at 10:49 AM Keith Busch <kbusch@kernel.org> wrote:
>
> On Wed, May 26, 2021 at 10:02:27AM +0800, Koba Ko wrote:
> > On Tue, May 25, 2021 at 3:44 PM Christoph Hellwig <hch@lst.de> wrote:
> > >
> > > On Thu, May 20, 2021 at 11:33:15AM +0800, Koba Ko wrote:
> > > > After resume, host can't change power state of the closed controller
> > > > from D3cold to D0.
> > >
> > > Why?
> > As per Kai-Heng said, it's a regression introduced by commit
> > b97120b15ebd ("nvme-pci:
> > use simple suspend when a HMB is enabled"). The affected NVMe is using HMB.
>
> That really doesn't add up. The mentioned commit restores the driver
> behavior for HMB drives that existed prior to d916b1be94b6d from kernel
> 5.3. Is that NVMe device broken in pre-5.3 kernels, too?

Quite likely. The system in question is a late 2020 Ice Lake laptop,
so it was released after 5.3 kernel.

Kai-Heng

  reply	other threads:[~2021-05-26 12:12 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210520033315.490584-1-koba.ko@canonical.com>
2021-05-25  7:44 ` [PATCH] nvme-pci: Avoid to go into d3cold if device can't use npss Christoph Hellwig
2021-05-25 16:49   ` Kai-Heng Feng
2021-05-25 20:14   ` Bjorn Helgaas
2021-05-26  2:02   ` Koba Ko
2021-05-26  2:49     ` Keith Busch
2021-05-26 12:11       ` Kai-Heng Feng [this message]
2021-05-26 12:59         ` Christoph Hellwig
2021-05-26 14:21           ` Kai-Heng Feng
2021-05-26 14:28             ` Christoph Hellwig
2021-05-26 14:47               ` Kai-Heng Feng
2021-05-26 15:06                 ` Bjorn Helgaas
2021-05-26 16:24                   ` Kai-Heng Feng
2021-05-27 11:40                     ` Christoph Hellwig
2021-05-27 12:08                       ` Kai-Heng Feng

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='CAAd53p7xabD2t__=t67uRLrrFOB7YGgr_GMhi6L48PFGhNe80w@mail.gmail.com' \
    --to=kai.heng.feng@canonical.com \
    --cc=axboe@fb.com \
    --cc=bhelgaas@google.com \
    --cc=hch@lst.de \
    --cc=hjhansen2020@gmail.com \
    --cc=kbusch@kernel.org \
    --cc=koba.ko@canonical.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-nvme@lists.infradead.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=sagi@grimberg.me \
    /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).