4.13-stable review patch. If anyone has any objections, please let me know.
------------------ From: Yan Markman <[email protected]> commit cda80a82ac3e89309706c027ada6ab232be1d640 upstream. Under heavy system stress mvebu SoC using Cortex A9 sporadically encountered instability issues. The "double linefill" feature of L2 cache was identified as causing dependency between read and write which lead to the deadlock. Especially, it was the cause of deadlock seen under heavy PCIe traffic, as this dependency violates PCIE overtaking rule. Fixes: c8f5a878e554 ("ARM: mvebu: use DT properties to fine-tune the L2 configuration") Signed-off-by: Yan Markman <[email protected]> Signed-off-by: Igal Liberman <[email protected]> Signed-off-by: Nadav Haklai <[email protected]> [[email protected]: reformulate commit log, add Armada 375 and add Fixes tag] Signed-off-by: Gregory CLEMENT <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/arm/boot/dts/armada-375.dtsi | 4 ++-- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- arch/arm/boot/dts/armada-39x.dtsi | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) --- a/arch/arm/boot/dts/armada-375.dtsi +++ b/arch/arm/boot/dts/armada-375.dtsi @@ -178,9 +178,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; }; --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -143,9 +143,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; }; --- a/arch/arm/boot/dts/armada-39x.dtsi +++ b/arch/arm/boot/dts/armada-39x.dtsi @@ -111,9 +111,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; };
