Re: [PATCH 4.19 06/77] scsi: scsi_transport_spi: Set RQF_PM for domain validation commands

Bart Van Assche
2021-01-14T01:44:42Z

On 1/13/21 3:47 AM, Pavel Machek wrote:
>> From: Bart Van Assche <bvanassche@acm.org>
>>
>> [ Upstream commit cfefd9f8240a7b9fdd96fcd54cb029870b6d8d88 ]
>>
>> Disable runtime power management during domain validation. Since a later
>> patch removes RQF_PREEMPT, set RQF_PM for domain validation commands such
>> that these are executed in the quiesced SCSI device state.
>
> This and "05/77] scsi: ide: Do not set the RQF_PREEMPT flag for" do
> not fix anything AFAICT. They are in series with other patches in
> 5.10, so they may make sense there, but I don't think we need them in
> 4.19.

Agreed. Please either backport the entire series of 8 patches or do not
backport any patch from that series. Selecting a subset of the patches
of that series is dangerous. As an example, applying patch 8/8 without
applying the prior patches from that series would break SCSI domain
validation. See also
https://lore.kernel.org/linux-scsi/20201209052951.16136-1-bvanassche@acm.org/

Thanks,

Bart.