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ACPI / PM: Make suspend_nvs_save() use acpi_os_map_memory()

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It turns out that the NVS memory region that suspend_nvs_save()
attempts to map has been already mapped by acpi_os_map_memory(), so
suspend_nvs_save() should better use acpi_os_map_memory() for mapping
memory to avoid conflicts.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2011-01-07 01:45:58 +01:00 committed by Len Brown
parent d146df18c1
commit ca9b600be3
1 changed files with 4 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/acpi/nvs.c
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@ -12,6 +12,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <acpi/acpiosxf.h>
/*
* Platforms, like ACPI, may want us to save some memory used by them during
@ -79,7 +80,7 @@ void suspend_nvs_free(void)
free_page((unsigned long)entry->data);
entry->data = NULL;
if (entry->kaddr) {
iounmap(entry->kaddr);
acpi_os_unmap_memory(entry->kaddr, entry->size);
entry->kaddr = NULL;
}
}
@ -113,7 +114,8 @@ int suspend_nvs_save(void)
list_for_each_entry(entry, &nvs_list, node)
if (entry->data) {
entry->kaddr = ioremap(entry->phys_start, entry->size);
entry->kaddr = acpi_os_map_memory(entry->phys_start,
entry->size);
if (!entry->kaddr) {
suspend_nvs_free();
return -ENOMEM;