linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Adrian Hunter <adrian.hunter@intel.com>
To: "Rafael J . Wysocki" <rafael@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Saravana Kannan <saravanak@google.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"James E . J . Bottomley" <jejb@linux.ibm.com>,
	linux-scsi@vger.kernel.org, Avri Altman <avri.altman@wdc.com>,
	Bean Huo <huobean@gmail.com>, Can Guo <cang@codeaurora.org>,
	Asutosh Das <asutoshd@codeaurora.org>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH V3 0/3] driver core: Add ability to delete device links of unregistered devices
Date: Sat, 10 Jul 2021 13:38:16 +0300	[thread overview]
Message-ID: <20210710103819.12532-1-adrian.hunter@intel.com> (raw)

Hi

There is an issue with the SCSI UFS driver when the optional
BOOT well-known LUN fails to probe, which is not a fatal error.
The issue is that the device and its "managed" device link do not
then get deleted.  The device because the device link has a
reference to it.  The device link because it can only be deleted
by device_del(), but device_add() was never called, so device_del()
never will be either.

Since V2, these patches fix the issue by amending device link removal to
accept removal of a link with an unregistered consumer device, as suggested
by Rafael.


Changes in V3:

    driver core: Prevent warning when removing a device link from unregistered consumer
	New patch split from "driver core: Add ability to delete device
	links of unregistered devices" except first chunk from that patch
	dropped as unnecessary

    driver core: Add ability to delete device links of unregistered devices
	Move warning fix to separate patch.


Changes in V2:

    Take approach suggested by Rafael


Adrian Hunter (3):
      driver core: Prevent warning when removing a device link from unregistered consumer
      driver core: Add ability to delete device links of unregistered devices
      scsi: ufshcd: Fix device links when BOOT WLUN fails to probe

 drivers/base/core.c       |  8 ++++++--
 drivers/scsi/ufs/ufshcd.c | 23 +++++++++++++++++++++--
 2 files changed, 27 insertions(+), 4 deletions(-)


Regards
Adrian

             reply	other threads:[~2021-07-10 10:38 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-10 10:38 Adrian Hunter [this message]
2021-07-10 10:38 ` [PATCH V3 1/3] driver core: Prevent warning when removing a device link from unregistered consumer Adrian Hunter
2021-07-10 15:19   ` Greg Kroah-Hartman
2021-07-14 18:21     ` Rafael J. Wysocki
2021-07-14 18:22   ` Rafael J. Wysocki
2021-07-10 10:38 ` [PATCH V3 2/3] driver core: Add ability to delete device links of unregistered devices Adrian Hunter
2021-07-14 18:26   ` Rafael J. Wysocki
2021-07-10 10:38 ` [PATCH V3 3/3] scsi: ufshcd: Fix device links when BOOT WLUN fails to probe Adrian Hunter

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=20210710103819.12532-1-adrian.hunter@intel.com \
    --to=adrian.hunter@intel.com \
    --cc=asutoshd@codeaurora.org \
    --cc=avri.altman@wdc.com \
    --cc=bvanassche@acm.org \
    --cc=cang@codeaurora.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=huobean@gmail.com \
    --cc=jejb@linux.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    --cc=rafael@kernel.org \
    --cc=saravanak@google.com \
    --subject='Re: [PATCH V3 0/3] driver core: Add ability to delete device links of unregistered devices' \
    /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

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).