This is a note to let you know that I have just added a patch titled
MIPS: Malta: Detect and fix bad memsize values
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt11.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 66cf2499fadb997e3e30294a57889253f889337e Mon Sep 17 00:00:00 2001
From: Markos Chandras <markos.chandras@xxxxxxxxxx>
Date: Fri, 27 Feb 2015 07:51:32 +0000
Subject: MIPS: Malta: Detect and fix bad memsize values
commit f7f8aea4b97c4d48e42f02cb37026bee445f239f upstream.
memsize denotes the amount of RAM we can access from kseg{0,1} and
that should be up to 256M. In case the bootloader reports a value
higher than that (perhaps reporting all the available RAM) it's best
if we fix it ourselves and just warn the user about that. This is
usually a problem with the bootloader and/or its environment.
[ralf@xxxxxxxxxxxxxx: Remove useless parens as suggested bei Sergei.
Reformat long pr_warn statement to fit into 80 column limit.]
Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/9362/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
arch/mips/mti-malta/malta-memory.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c
index fdffc806664f..9b3a07d962ce 100644
--- a/arch/mips/mti-malta/malta-memory.c
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -52,6 +52,12 @@ fw_memblock_t * __init fw_getmdesc(int eva)
pr_warn("memsize not set in YAMON, set to default (32Mb)\n");
physical_memsize = 0x02000000;
} else {
+ if (memsize > (256 << 20)) { /* memsize should be capped to 256M */
+ pr_warn("Unsupported memsize value (0x%lx) detected! "
+ "Using 0x10000000 (256M) instead\n",
+ memsize);
+ memsize = 256 << 20;
+ }
/* If ememsize is set, then set physical_memsize to that */
physical_memsize = ememsize ? : memsize;
}
