NACK: [PATCH 0/1][SRU][Unstable/OEM-6.0] Fix suspend failure on t7xx equipped platform

[You-Sheng Yang]

Nack as an update coming.

On Wed, Nov 2, 2022 at 4:32 PM You-Sheng Yang <vicamo.yang at canonical.com> wrote:
>
> From: "You-Sheng Yang (vicamo)" <vicamo.yang at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/1990700
>
> [Impact]
>
> Fibocom WWAN FM350-GL equipped platform fails to suspend.
>
> [Fix]
>
> Full t7xx driver is still under development and some of them have
> already accepted and merged in mainline kernel. The following commits
> are once in the mainline and are reverted in v6.0:
>
>   d20ef656f994 net: wwan: t7xx: Add AP CLDMA
>   007f26f0d68e net: wwan: t7xx: Infrastructure for early port configuration
>   140424d90165 net: wwan: t7xx: PCIe reset rescan
>   87dae9e70bf7 net: wwan: t7xx: Enable devlink based fw flashing and
>                coredump collection
>
> The first patch implemented the other AP-CLDMA, and with that applied,
> platforms in question may suspend and resume normally as every bits are in
> position.
>
> However, while these patches had been reverted for another revision that is
> still being worked on by the hardware vendor, a minimum, sauced patch is
> created to work-around this first to meet project schedules, and will be
> reverted and superseded with a final, mainline landing revision.
>
> [Test Case]
>
> Trigger suspend and there should be no more suspend errors from t7xx:
>
>   mtk_t7xx 0000:58:00.0: [PM] SAP suspend error: -110
>   mtk_t7xx 0000:58:00.0: PM: pci_pm_suspend(): t7xx_pci_pm_suspend+0x0/0x20 [mtk_t7xx] returns -110
>   mtk_t7xx 0000:58:00.0: PM: dpm_run_callback(): pci_pm_suspend+0x0/0x1a0 returns -110
>   mtk_t7xx 0000:58:00.0: PM: failed to suspend async: error -110
>
> [Where problems could occur]
>
> The t7xx driver is still incomplete and we're staging aforementioned 4 patches
> in internal experimental kernels for development use.
>
> [Other Info]
>
> This targets oem-6.0 and above, so only Unstable and OEM-6.0 are nominated for
> fix.
>
> Sethuraman, Muralidharan (1):
>   UBUNTU: SAUCE: t7xx: skip suspend to AP-CLDMA
>
>  drivers/net/wwan/t7xx/t7xx_pci.c | 7 -------
>  1 file changed, 7 deletions(-)
>
> --
> 2.37.2
>
>
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-- 
Regards,
You-Sheng Yang