From 462a088c474832b19ff2730de1e6bea66d399c23 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= Date: Sat, 15 Oct 2022 23:01:29 +0200 Subject: Add Turris kernel (includes patches from OpenWrt) --- ...bu-indicate-failure-to-enter-deeper-sleep.patch | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 pkgs/patches-linux-5.15/800-cpuidle-mvebu-indicate-failure-to-enter-deeper-sleep.patch (limited to 'pkgs/patches-linux-5.15/800-cpuidle-mvebu-indicate-failure-to-enter-deeper-sleep.patch') diff --git a/pkgs/patches-linux-5.15/800-cpuidle-mvebu-indicate-failure-to-enter-deeper-sleep.patch b/pkgs/patches-linux-5.15/800-cpuidle-mvebu-indicate-failure-to-enter-deeper-sleep.patch new file mode 100644 index 0000000..29f36be --- /dev/null +++ b/pkgs/patches-linux-5.15/800-cpuidle-mvebu-indicate-failure-to-enter-deeper-sleep.patch @@ -0,0 +1,40 @@ +From c28b2d367da8a471482e6a4aa8337ab6369a80c2 Mon Sep 17 00:00:00 2001 +From: Russell King +Date: Sat, 3 Oct 2015 09:13:05 +0100 +Subject: cpuidle: mvebu: indicate failure to enter deeper sleep states + +The cpuidle ->enter method expects the return value to be the sleep +state we entered. Returning negative numbers or other codes is not +permissible since coupled CPU idle was merged. + +At least some of the mvebu_v7_cpu_suspend() implementations return the +value from cpu_suspend(), which returns zero if the CPU vectors back +into the kernel via cpu_resume() (the success case), or the non-zero +return value of the suspend actor, or one (failure cases). + +We do not want to be returning the failure case value back to CPU idle +as that indicates that we successfully entered one of the deeper idle +states. Always return zero instead, indicating that we slept for the +shortest amount of time. + +Signed-off-by: Russell King +--- + drivers/cpuidle/cpuidle-mvebu-v7.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +--- a/drivers/cpuidle/cpuidle-mvebu-v7.c ++++ b/drivers/cpuidle/cpuidle-mvebu-v7.c +@@ -39,8 +39,12 @@ static int mvebu_v7_enter_idle(struct cp + ret = mvebu_v7_cpu_suspend(deepidle); + cpu_pm_exit(); + ++ /* ++ * If we failed to enter the desired state, indicate that we ++ * slept lightly. ++ */ + if (ret) +- return ret; ++ return 0; + + return index; + } -- cgit v1.2.3