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 V4:
driver core: Prevent warning when removing a device link from unregistered consumer
Add stable tag and Rafael's Reviewed-by
driver core: Add ability to delete device links of unregistered devices
Amend comment "discover an error" -> "discovering an error"
Merge with next patch
scsi: ufshcd: Fix device links when BOOT WLUN fails to probe
Merge with previous patch
Add Rafael's Reviewed-by
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 (2):
driver core: Prevent warning when removing a device link from unregistered consumer
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
