Messages in this thread | | | Date | Fri, 17 Jul 2020 13:16:18 -0400 | From | Sasha Levin <> | Subject | Re: [PATCH 4.14 105/136] usb/ehci-platform: Set PM runtime as active on resume |
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On Fri, Jul 17, 2020 at 05:17:23PM +0100, Qais Yousef wrote: >Hi Eugeniu > >On 07/09/20 09:00, Eugeniu Rosca wrote: >> Hello everyone, >> >> Cc: linux-renesas-soc >> Cc: linux-pm > >[...] > >> After integrating v4.14.186 commit 5410d158ca2a50 ("usb/ehci-platform: >> Set PM runtime as active on resume") into downstream v4.14.x, we started >> to consistently experience below panic [1] on every second s2ram of >> R-Car H3 Salvator-X Renesas reference board. >> >> After some investigations, we concluded the following: >> - the issue does not exist in vanilla v5.8-rc4+ >> - [bisecting shows that] the panic on v4.14.186 is caused by the lack >> of v5.6-rc1 commit 987351e1ea7772 ("phy: core: Add consumer device >> link support"). Getting evidence for that is easy. Reverting >> 987351e1ea7772 in vanilla leads to a similar backtrace [2]. >> >> Questions: >> - Backporting 987351e1ea7772 ("phy: core: Add consumer device >> link support") to v4.14.187 looks challenging enough, so probably not >> worth it. Anybody to contradict this? >> - Assuming no plans to backport the missing mainline commit to v4.14.x, >> should the following three v4.14.186 commits be reverted on v4.14.x? >> * baef809ea497a4 ("usb/ohci-platform: Fix a warning when hibernating") >> * 9f33eff4958885 ("usb/xhci-plat: Set PM runtime as active on resume") >> * 5410d158ca2a50 ("usb/ehci-platform: Set PM runtime as active on resume") > >Thanks for investigating this. > >Alan, Greg, do you have any ideas?
I've reverted these 3 commits from 5.4 and earlier, thank you for investigating this issue.
-- Thanks, Sasha
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