Re: [PATCH v4 00/23] Fix libata suspend/resume handling and code cleanup

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Hi Damien,

On Wed, Sep 20, 2023 at 3:54 PM Damien Le Moal <dlemoal@xxxxxxxxxx> wrote:
> The first 9 patches of this series fix several issues with suspend/resume
> power management operations in scsi and libata. The most significant
> changes introduced are in patch 4 and 5, where the manage_start_stop
> flag of scsi devices is split into the manage_system_start_stop and
> manage_runtime_start_stop flags to allow keeping scsi runtime power
> operations for spining up/down ATA devices but have libata do its own
> system suspend/resume device power state management using EH.
> The remaining patches are code cleanup that do not introduce any
> significant functional change.
> This series was tested on qemu and on various PCs and servers. I am
> CC-ing people who recently reported issues with suspend/resume.
> Additional testing would be much appreciated.
> Changes from v3:
>  * Corrected pathc 1 (typo in commit message and WARN_ON() removal)
>  * Changed path 3 as suggested by Niklas (moved definition of
>    ->slave_alloc)
>  * Rebased on rc2
>  * Added review tags

Thanks for the update!

I gave this a try on Renesas Salvator-XS with R-Car H3 ES2.0 and
a SATA hard drive:
  - The drive is spun up during system resume,
  - Accessing the drive after the system was resumed is instantaneous.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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