Re: [PATCH v4 5/5] scsi: ufs: Ungate the clock synchronously

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On 5/29/2023 1:26 PM, Bart Van Assche wrote:
Ungating the clock asynchronously causes ufshcd_queuecommand() to return
SCSI_MLQUEUE_HOST_BUSY and hence causes commands to be requeued.  This is
suboptimal. Allow ufshcd_queuecommand() to sleep such that clock ungating
does not trigger command requeuing. Remove the ufshcd_scsi_block_requests()
and ufshcd_scsi_unblock_requests() calls because these are no longer
needed. The flush_work(&hba->clk_gating.ungate_work) call is sufficient to
make the SCSI core wait for clock ungating to complete.

Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>

Reviewed-by: Bao D. Nguyen <quic_nguyenb@xxxxxxxxxxx>




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