Re: [PATCH v9 0/9] Fix up and simplify error recovery mechanism

["Asutosh Das (asd)" <asutoshd@codeaurora.org>]

On 8/3/2020 2:04 AM, Can Guo wrote:
> The changes have been tested with error injections of multiple error types (and
> all kinds of mixture of them) during runtime, e.g. hibern8 enter/ exit error,
> power mode change error and fatal/non-fatal error from IRQ context. During the
> test, error injections happen randomly across all contexts, e.g. clk scaling,
> clk gate/ungate, runtime suspend/resume and IRQ.
> 
> There are a few more fixes to resolve other minor problems based on the main
> change, such as LINERESET handling and racing btw error handler and system
> suspend/resume/shutdown, but they will be pushed after this series is taken,
> due to there are already too many lines in these changes.
> 
> Change since v8:
> - Added one more fix to ufshcd_abort as requested by Stanley Chu
> 
> Change since v7:
> - Incorporated Asutosh's comments
> - Refined patch "scsi: ufs: Recover hba runtime PM error in error handler"
> 
> Change since v6:
> - Modified change "scsi: ufs-qcom: Fix schedule while atomic error in ufs_qcom_dump_dbg_regs" to "scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs"
> 
> Change since v5:
> - Dropped change "scsi: ufs: Fix imbalanced scsi_block_reqs_cnt caused by ufshcd_hold()" as it is not quite related with this series
> - Refined func ufshcd_err_handling_prepare in change "scsi: ufs: Recover hba runtime PM error in error handler"
> 
> Change since v4:
> - Split the original change "ufs: ufs-qcom: Fix a few BUGs in func ufs_qcom_dump_dbg_regs()" to 2 small changes
> 
> Change since v3:
> - Split the original change "scsi: ufs: Fix up and simplify error recovery mechanism" into 5 changes
> 
> Change since v2:
> - Incorporate Bart's comment to change "scsi: ufs: Add checks before setting clk-gating states"
> - Revised the commit msg of change "scsi: ufs: Fix up and simplify error recovery mechanism"
> 
> Change since v1:
> - Fixed a compilation error in case that CONFIG_PM is N
> 
> Can Guo (9):
>    scsi: ufs: Add checks before setting clk-gating states
>    ufs: ufs-qcom: Fix race conditions caused by func
>      ufs_qcom_testbus_config
>    scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs
>    scsi: ufs: Add some debug infos to ufshcd_print_host_state
>    scsi: ufs: Fix concurrency of error handler and other error recovery
>      paths
>    scsi: ufs: Recover hba runtime PM error in error handler
>    scsi: ufs: Move dumps in IRQ handler to error handler
>    scsi: ufs: Fix a racing problem btw error handler and runtime PM ops
>    scsi: ufs: Properly release resources if a task is aborted
>      successfully
> 
>   drivers/scsi/ufs/ufs-qcom.c  |  37 ----
>   drivers/scsi/ufs/ufs-sysfs.c |   1 +
>   drivers/scsi/ufs/ufshcd.c    | 508 +++++++++++++++++++++++++++----------------
>   drivers/scsi/ufs/ufshcd.h    |  14 ++
>   4 files changed, 338 insertions(+), 222 deletions(-)
> 

Please add my ack to the series.

Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>

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