The first patch fixes many issues with current task management handling
in UFSHCD driver. Others improve error handling in various scenarios.
These patches are rebased on:
[PATCH 9/9] drivers/scsi/ufs: don't check resource with devm_ioremap_resource
Changes from v4:
- Addressed comments from Seungwon Jeon on V3
- Updated with proper locking while ufshcd state changes
- Retained LUN reset instead of device reset with DME_END_POINT_RESET
- Removed error handling decisions dependent on OCS value
- Simplified fatal error handling to abort the requests first
and then carry out reset.
Changes from v3:
- Rebased.
Changes from v2:
- [PATCH V3 1/4]: Make the task management command task tag unique
across SCSI/NOP/QUERY request tags.
- [PATCH V3 3/4]: While handling device/host reset, wait for
pending fatal handler to return if running.
Changes from v1:
- [PATCH V2 1/4]: Fix a race condition because of overloading
outstanding_tasks variable to lock the slots. A new variable
tm_slots_in_use will track which slots are in use by the driver.
- [PATCH V2 2/4]: Commit text update to clarify the hardware race
with more details.
- [PATCH V2 3/4]: Minor cleanup and rebase
- [PATCH V2 4/4]: Fix a bug - sleeping in atomic context
Sujit Reddy Thumma (4):
scsi: ufs: Fix broken task management command implementation
scsi: ufs: Fix hardware race conditions while aborting a command
scsi: ufs: Fix device and host reset methods
scsi: ufs: Improve UFS fatal error handling
drivers/scsi/ufs/ufshcd.c | 684 ++++++++++++++++++++++++++++++++-------------
drivers/scsi/ufs/ufshcd.h | 20 +-
2 files changed, 501 insertions(+), 203 deletions(-)
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