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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 V2 0/2] driver core: Add ability to delete device links of unregistered devices
Date: Fri,  9 Jul 2021 09:43:39 +0300	[thread overview]
Message-ID: <20210709064341.6206-1-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.

These V2 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 V2:

	Take approach suggested by Rafael


Adrian Hunter (2):
      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       | 11 ++++++++---
 drivers/scsi/ufs/ufshcd.c | 23 +++++++++++++++++++++--
 2 files changed, 29 insertions(+), 5 deletions(-)


Regards
Adrian

             reply	other threads:[~2021-07-09  6:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-09  6:43 Adrian Hunter [this message]
2021-07-09  6:43 ` [PATCH V2 1/2] " Adrian Hunter
2021-07-09  9:55   ` Greg Kroah-Hartman
2021-07-09 11:19     ` Rafael J. Wysocki
2021-07-09 11:28   ` Rafael J. Wysocki
2021-07-09 13:18     ` Adrian Hunter
2021-07-09  6:43 ` [PATCH V2 2/2] scsi: ufshcd: Fix device links when BOOT WLUN fails to probe Adrian Hunter

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