From: Sasha Levin <sashal@kernel.org> This reverts commit 661f5686a1c805e9b1bff65c312c38ef97faa91d. Eugeniu Rosca writes: On Thu, Jul 09, 2020 at 09:00:23AM +0200, Eugeniu Rosca wrote:
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"
Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/usb/host/xhci-plat.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index 65972c186c64..adc437ca83b8 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -408,15 +408,7 @@ static int __maybe_unused xhci_plat_resume(struct device *dev) if (ret) return ret; - ret = xhci_resume(xhci, 0); - if (ret) - return ret; - - pm_runtime_disable(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); - - return 0; + return xhci_resume(xhci, 0); } static int __maybe_unused xhci_plat_runtime_suspend(struct device *dev) -- 2.25.1