linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH RFC 0/2] driver core: Add ability to delete device links of unregistered devices
@ 2021-07-07 17:29 Adrian Hunter
  2021-07-07 17:29 ` [PATCH RFC 1/2] " Adrian Hunter
                   ` (2 more replies)
  0 siblings, 3 replies; 17+ messages in thread
From: Adrian Hunter @ 2021-07-07 17:29 UTC (permalink / raw)
  To: Rafael J . Wysocki
  Cc: Greg Kroah-Hartman, Saravana Kannan, Martin K . Petersen,
	James E . J . Bottomley, linux-scsi, Avri Altman, Bean Huo,
	Can Guo, Asutosh Das, Bart Van Assche, linux-pm, linux-kernel

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.

It is not clear if there is a way to get rid of the device link in
this case, so here is a patch to add a function that does just that.

There is also a patch to use the new function to fix the issue with
the SCSI UFS driver.


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

 Documentation/driver-api/device_link.rst |  7 +++++--
 drivers/base/core.c                      | 22 +++++++++++++++++++---
 drivers/scsi/ufs/ufshcd.c                |  7 +++++++
 include/linux/device.h                   |  1 +
 4 files changed, 32 insertions(+), 5 deletions(-)


Regards
Adrian

^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2021-07-08 17:40 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-07-07 17:29 [PATCH RFC 0/2] driver core: Add ability to delete device links of unregistered devices Adrian Hunter
2021-07-07 17:29 ` [PATCH RFC 1/2] " Adrian Hunter
2021-07-07 17:38   ` Greg Kroah-Hartman
2021-07-07 17:29 ` [PATCH RFC 2/2] scsi: ufshcd: Fix device links when BOOT WLUN fails to probe Adrian Hunter
2021-07-07 17:39   ` Greg Kroah-Hartman
2021-07-07 17:49     ` Adrian Hunter
2021-07-08 12:31       ` Rafael J. Wysocki
2021-07-08 14:17         ` Adrian Hunter
2021-07-08 15:03           ` Rafael J. Wysocki
2021-07-08 15:12             ` Rafael J. Wysocki
2021-07-08 16:02               ` Adrian Hunter
2021-07-08 16:45           ` Saravana Kannan
2021-07-08 16:48             ` Rafael J. Wysocki
2021-07-08 16:57               ` Saravana Kannan
2021-07-08 17:39                 ` Rafael J. Wysocki
2021-07-07 17:40 ` [PATCH RFC 0/2] driver core: Add ability to delete device links of unregistered devices Greg Kroah-Hartman
2021-07-07 17:41   ` Saravana Kannan

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).