RE: [EXT] [PATCH v1 5/5] scsi: ufs: Complete pending requests in host reset and restore path

[Bean Huo (beanhuo)]

> 
> In UFS host reset and restore path, before probe, we stop and start the host
> controller once. After host controller is stopped, the pending requests, if any,
> are cleared from the doorbell, but no completion IRQ would be raised due to the
> hba is stopped.
> These pending requests shall be completed along with the first NOP_OUT
> command(as it is the first command which can raise a transfer completion
> IRQ) sent during probe.

Hi, Can
I am not sure for this point, because there is HW/SW device reset before or after host reset/restore.
Device HW/SW reset also will clear the pended tasks in device side. That will be better.
I think Qcom platform already enabled HW reset.

//Bean

> Since the OCSs of these pending requests are not SUCCESS(because they are not
> yet literally finished), their UPIUs shall be dumped. When there are multiple
> pending requests, the UPIU dump can be overwhelming and may lead to stability
> issues because it is in atomic context.
> Therefore, before probe, complete these pending requests right after host
> controller is stopped.