From: Felix Fietkau Date: Mon, 19 Mar 2018 20:58:12 +0000 (+0100) Subject: mvebu: disable cpu idle on WRT1900ACv1 X-Git-Tag: v18.06.0-rc1~588 X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=commitdiff_plain;h=5faa9556b1c10a4b21208615bddb7480401fa213 mvebu: disable cpu idle on WRT1900ACv1 A regression seriously affecting the Linksys WRT1900ACv1 (Mamba) was introduced some time between the OpenWrt/LEDE v4.4 and v4.9 kernels. The root cause has not yet been identified, despite many attempts for more than a year. Disabling the SoC specific CPU idle support should mitigate this issue. The symptoms on an affected system are unwanted reboots at a variable frequency. In many cases almost immediately after boot, causing a bootloop. This effectively disables support for Mamba on OpenWrt with kernels > v4.4. Signed-off-by: Felix Fietkau --- diff --git a/target/linux/mvebu/patches-4.14/230-armada-xp-linksys-mamba-broken-idle.patch b/target/linux/mvebu/patches-4.14/230-armada-xp-linksys-mamba-broken-idle.patch new file mode 100644 index 0000000000..e82a899a75 --- /dev/null +++ b/target/linux/mvebu/patches-4.14/230-armada-xp-linksys-mamba-broken-idle.patch @@ -0,0 +1,10 @@ +--- a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts ++++ b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts +@@ -563,3 +563,7 @@ + }; + }; + }; ++ ++&coherencyfab { ++ broken-idle; ++};