[3.8.y.z extended stable] Patch "ARM: footbridge: fix VGA initialisation" has been added to staging queue
Kamal Mostafa
kamal at canonical.com
Fri Dec 20 20:21:10 UTC 2013
This is a note to let you know that I have just added a patch titled
ARM: footbridge: fix VGA initialisation
to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue
This patch is scheduled to be released in version 3.8.13.15.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From 9a0760ed6e76432acdcb7de19ddc66875fa169d4 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel at arm.linux.org.uk>
Date: Thu, 28 Nov 2013 21:55:41 +0000
Subject: ARM: footbridge: fix VGA initialisation
commit 43659222e7a0113912ed02f6b2231550b3e471ac upstream.
It's no good setting vga_base after the VGA console has been
initialised, because if we do that we get this:
Unable to handle kernel paging request at virtual address 000b8000
pgd = c0004000
[000b8000] *pgd=07ffc831, *pte=00000000, *ppte=00000000
0Internal error: Oops: 5017 [#1] ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0+ #49
task: c03e2974 ti: c03d8000 task.ti: c03d8000
PC is at vgacon_startup+0x258/0x39c
LR is at request_resource+0x10/0x1c
pc : [<c01725d0>] lr : [<c0022b50>] psr: 60000053
sp : c03d9f68 ip : 000b8000 fp : c03d9f8c
r10: 000055aa r9 : 4401a103 r8 : ffffaa55
r7 : c03e357c r6 : c051b460 r5 : 000000ff r4 : 000c0000
r3 : 000b8000 r2 : c03e0514 r1 : 00000000 r0 : c0304971
Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel
which is an access to the 0xb8000 without the PCI offset required to
make it work.
Fixes: cc22b4c18540 ("ARM: set vga memory base at run-time")
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
arch/arm/mach-footbridge/common.c | 3 +++
arch/arm/mach-footbridge/dc21285.c | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index a42b369..95d0b6e 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
+#include <video/vga.h>
#include <asm/pgtable.h>
#include <asm/page.h>
@@ -196,6 +197,8 @@ void __init footbridge_map_io(void)
iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
}
+
+ vga_base = PCIMEM_BASE;
}
void footbridge_restart(char mode, const char *cmd)
diff --git a/arch/arm/mach-footbridge/dc21285.c b/arch/arm/mach-footbridge/dc21285.c
index 3490a24..7c2fdae 100644
--- a/arch/arm/mach-footbridge/dc21285.c
+++ b/arch/arm/mach-footbridge/dc21285.c
@@ -18,7 +18,6 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/spinlock.h>
-#include <video/vga.h>
#include <asm/irq.h>
#include <asm/mach/pci.h>
@@ -291,7 +290,6 @@ void __init dc21285_preinit(void)
int cfn_mode;
pcibios_min_mem = 0x81000000;
- vga_base = PCIMEM_BASE;
mem_size = (unsigned int)high_memory - PAGE_OFFSET;
for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
--
1.8.3.2
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