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| author | Pavel Machek <pavel@ucw.cz> | 2008-03-13 23:05:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-03-21 17:06:15 +0100 |
| commit | 2050d45d7c32cbad7a070d04256237144a0920db (patch) | |
| tree | 7eb2999908d05c1dcb1b7aca416cd3aef88de58f /arch/x86/kernel/aperture_64.c | |
| parent | 96bcf458cbc71fc08f4d10e0b5bf1b18702b2344 (diff) | |
| download | op-kernel-dev-2050d45d7c32cbad7a070d04256237144a0920db.zip op-kernel-dev-2050d45d7c32cbad7a070d04256237144a0920db.tar.gz | |
x86: fix long standing bug with usb after hibernation with 4GB ram
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>
Diffstat (limited to 'arch/x86/kernel/aperture_64.c')
| -rw-r--r-- | 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 608152a..00df126 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> @@ -76,6 +77,8 @@ static u32 __init allocate_aperture(void) printk(KERN_INFO "Mapping aperture over %d KB of RAM @ %lx\n", 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); } |
