APPLIED [OEM-6.1] Re: [PATCH 0/1][SRU][K][L][M][OEM-6.1] FM350(mtk_t7xx) failed to suspend, or early wake while suspending

[Timo Aaltonen]

AceLan Kao kirjoitti 25.5.2023 klo 10.18:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://launchpad.net/bugs/2020743
> 
> [Impact]
> FM350(mtk_t7xx) can't suspend sometimes.
> 
> kernel: [ 12.917396] mtk_t7xx 0000:57:00.0: [PM] Exiting suspend, modem in invalid state
> kernel: [ 12.917406] mtk_t7xx 0000:57:00.0: PM: pci_pm_suspend(): t7xx_pci_pm_suspend+0x0/0x20 [mtk_t7xx] returns -14
> kernel: [ 12.917446] mtk_t7xx 0000:57:00.0: PM: dpm_run_callback(): pci_pm_suspend+0x0/0x1b0 returns -14
> kernel: [ 12.917462] mtk_t7xx 0000:57:00.0: PM: failed to suspend async: error -14
> 
> [Fix]
> The commit in v6.4-rc3 waits for the device to be ready before suspending.
> ab87603b2511 net: wwan: t7xx: Ensure init is completed before system sleep
> 
> [Test]
> Verified on the machine with FM350 wwan module.
> 
> [Where problems could occur]
> If the wwan is not ready before the time is up, it results in -ETIMEDOUT.
> However, in this scenario, we will encounter the same issue where the system
> fails to enter suspend mode. Therefore, it will not introduce regressions
> or new issues.
> 
> Kai-Heng Feng (1):
>    net: wwan: t7xx: Ensure init is completed before system sleep
> 
>   drivers/net/wwan/t7xx/t7xx_pci.c | 18 ++++++++++++++++++
>   drivers/net/wwan/t7xx/t7xx_pci.h |  1 +
>   2 files changed, 19 insertions(+)
> 

merged via gitea, thanks

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