ACPI: Battery: Allow extract string from integer

Some machines return integer instead of expected string.

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Andrey Borzenkov <arvidjaar@mail.ru>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 15 insertions, 10 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 74caa07ad351..c2ce0ad21693 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -262,7 +262,7 @@ static int extract_package(struct acpi_battery *battery,
                            union acpi_object *package,
                            struct acpi_offsets *offsets, int num)
 {
-        int i, *x;
+        int i;
         union acpi_object *element;
         if (package->type != ACPI_TYPE_PACKAGE)
                 return -EFAULT;
@@ -271,16 +271,21 @@ static int extract_package(struct acpi_battery *battery,
                         return -EFAULT;
                 element = &package->package.elements[i];
                 if (offsets[i].mode) {
-                        if (element->type != ACPI_TYPE_STRING &&
-                            element->type != ACPI_TYPE_BUFFER)
-                                return -EFAULT;
-                        strncpy((u8 *)battery + offsets[i].offset,
-                                element->string.pointer, 32);
+                        u8 *ptr = (u8 *)battery + offsets[i].offset;
+                        if (element->type == ACPI_TYPE_STRING ||
+                            element->type == ACPI_TYPE_BUFFER)
+                                strncpy(ptr, element->string.pointer, 32);
+                        else if (element->type == ACPI_TYPE_INTEGER) {
+                                strncpy(ptr, (u8 *)&element->integer.value,
+                                        sizeof(acpi_integer));
+                                ptr[sizeof(acpi_integer)] = 0;
+                        } else return -EFAULT;
                 } else {
-                        if (element->type != ACPI_TYPE_INTEGER)
-                                return -EFAULT;
-                        x = (int *)((u8 *)battery + offsets[i].offset);
-                        *x = element->integer.value;
+                        if (element->type == ACPI_TYPE_INTEGER) {
+                                int *x = (int *)((u8 *)battery +
+                                                offsets[i].offset);
+                                *x = element->integer.value;
+                        } else return -EFAULT;
                 }
         }
         return 0;