This is a note to let you know that I've just added the patch titled
ARM: 7938/1: OMAP4/highbank: Flush L2 cache before disabling
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-7938-1-omap4-highbank-flush-l2-cache-before-disabling.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b25f3e1c358434bf850220e04f28eebfc45eb634 Mon Sep 17 00:00:00 2001
From: Taras Kondratiuk <taras.kondratiuk@xxxxxxxxxx>
Date: Fri, 10 Jan 2014 01:27:08 +0100
Subject: ARM: 7938/1: OMAP4/highbank: Flush L2 cache before disabling
From: Taras Kondratiuk <taras.kondratiuk@xxxxxxxxxx>
commit b25f3e1c358434bf850220e04f28eebfc45eb634 upstream.
Kexec disables outer cache before jumping to reboot code, but it doesn't
flush it explicitly. Flush is done implicitly inside of l2x0_disable().
But some SoC's override default .disable handler and don't flush cache.
This may lead to a corrupted memory during Kexec reboot on these
platforms.
This patch adds cache flush inside of OMAP4 and Highbank outer_cache.disable()
handlers to make it consistent with default l2x0_disable().
Acked-by: Rob Herring <rob.herring@xxxxxxxxxxx>
Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@xxxxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-highbank/highbank.c | 1 +
arch/arm/mach-omap2/omap4-common.c | 1 +
2 files changed, 2 insertions(+)
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -66,6 +66,7 @@ void highbank_set_cpu_jump(int cpu, void
static void highbank_l2x0_disable(void)
{
+ outer_flush_all();
/* Disable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x0);
}
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -163,6 +163,7 @@ void __iomem *omap4_get_l2cache_base(voi
static void omap4_l2x0_disable(void)
{
+ outer_flush_all();
/* Disable PL310 L2 Cache controller */
omap_smc1(0x102, 0x0);
}
Patches currently in stable-queue which might be from taras.kondratiuk@xxxxxxxxxx are
queue-3.12/arm-7938-1-omap4-highbank-flush-l2-cache-before-disabling.patch
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