UBUNTU: x86: fix long standing bug with usb after hibernation with 4GB ram
 

Bug: #206996

commit 2050d45d7c32cbad7a070d04256237144a0920db
Author: Pavel Machek <pavel@ucw.cz>
Date: Thu Mar 13 23:05:41 2008 +0100

aperture_64.c takes a piece of memory and makes it into iommu
window... but such window may not be saved by swsusp -- that leads to
oops during hibernation.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
---
arch/x86/kernel/aperture_64.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 5b69927..e469a1d 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -18,6 +18,7 @@
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/ioport.h>
+#include <linux/suspend.h>
#include <asm/e820.h>
#include <asm/io.h>
#include <asm/gart.h>
@@ -75,6 +76,8 @@ static u32 __init allocate_aperture(void)
printk("Mapping aperture over %d KB of RAM @ %lx
",
aper_size >> 10, __pa(p));
insert_aperture_resource((u32)__pa(p), aper_size);
+ register_nosave_region((u32)__pa(p) >> PAGE_SHIFT,
+ (u32)__pa(p+aper_size) >> PAGE_SHIFT);
return (u32)__pa(p);
}

--
1.5.4.3


--------------020103050109060703010301
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

--
kernel-team mailing list
kernel-team@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/kernel-team

--------------020103050109060703010301--