This is a note to let you know that I've just added the patch titled
ARM: dts: disable MDMA1 node for exynos5420
to the 3.14-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-dts-disable-mdma1-node-for-exynos5420.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e6015c1f8a9032c2aecb78d23edf49582563bd47 Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@xxxxxxxxxxx>
Date: Fri, 9 May 2014 07:02:33 +0900
Subject: ARM: dts: disable MDMA1 node for exynos5420
From: Seungwon Jeon <tgih.jun@xxxxxxxxxxx>
commit e6015c1f8a9032c2aecb78d23edf49582563bd47 upstream.
This change places MDMA1 in disabled node for Exynos5420.
If MDMA1 region is configured with secure mode, it makes
the boot failure with the following on smdk5420 board.
("Unhandled fault: imprecise external abort (0x1406) at 0x00000000")
Thus, arndale-octa board don't need to do the same thing anymore.
Signed-off-by: Seungwon Jeon <tgih.jun@xxxxxxxxxxx>
Tested-by: Javi Merino <javi.merino@xxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
Signed-off-by: Tushar Behera <tushar.b@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Tested on top of v3.14.10.
Fixes issue reported at [1].
[1]
http://armcloud.us/kernel-ci/stable/v3.14.10/arm-exynos_defconfig/boot-exynos5420-arndale-octa.html
arch/arm/boot/dts/exynos5420.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -323,6 +323,13 @@
#dma-cells = <1>;
#dma-channels = <8>;
#dma-requests = <1>;
+ /*
+ * MDMA1 can support both secure and non-secure
+ * AXI transactions. When this is enabled in the kernel
+ * for boards that run in secure mode, we are getting
+ * imprecise external aborts causing the kernel to oops.
+ */
+ status = "disabled";
};
};
Patches currently in stable-queue which might be from tgih.jun@xxxxxxxxxxx are
queue-3.14/arm-dts-disable-mdma1-node-for-exynos5420.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html