Edgar Hucek <[email protected]> wrote:
>
> When EFI is enabled acpi_os_unmap_memory trys to unmap memory
> which was not mapped by acpi_os_map_memory.
Your email client replaces tabs with spaces and wordwraps things.
The patch could be cleaned up a bit..
Matt, ACPi people: please ack or nack asap.
From: Edgar Hucek <[email protected]>
When EFI is enabled acpi_os_unmap_memory t] rys to unmap memory
which was not mapped by acpi_os_map_memory.
Signed-off-by: Edgar Hucek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/acpi/osl.c | 4 ++++
1 files changed, 4 insertions(+)
diff -puN drivers/acpi/osl.c~efi-iounpam-fix-for-acpi_os_unmap_memory drivers/acpi/osl.c
--- devel/drivers/acpi/osl.c~efi-iounpam-fix-for-acpi_os_unmap_memory 2006-02-20 21:55:48.000000000 -0800
+++ devel-akpm/drivers/acpi/osl.c 2006-02-20 21:58:36.000000000 -0800
@@ -208,6 +208,10 @@ EXPORT_SYMBOL_GPL(acpi_os_map_memory);
void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
{
+ /* Don't unmap memory which was not mapped by acpi_os_map_memory */
+ if (efi_enabled &&
+ (efi_mem_attributes(virt_to_phys(virt)) & EFI_MEMORY_WB))
+ return;
iounmap(virt);
}
EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
_
-
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