Messages in this thread | | | From | Adrian Hunter <> | Subject | [PATCH V4 0/2] driver core: Add ability to delete device links of unregistered devices | Date | Fri, 16 Jul 2021 14:44:06 +0300 |
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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
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