platform: x86: throw away custom methods

In 2.6.35 the hex_to_bin() was introduced.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Matthew Garrett <mjg@redhat.com>

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index b2978a04317f9de32755a719b4c7abe215e588b6..49806824a463ae6347f67d73a5aeae13f09793a6 100644 (file)
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -128,30 +128,18 @@ static struct acpi_driver acpi_wmi_driver = {
  */
 static int wmi_parse_hexbyte(const u8 *src)
 {
-       unsigned int x; /* For correct wrapping */
        int h;
+       int value;
 
        /* high part */
-       x = src[0];
-       if (x - '0' <= '9' - '0') {
-               h = x - '0';
-       } else if (x - 'a' <= 'f' - 'a') {
-               h = x - 'a' + 10;
-       } else if (x - 'A' <= 'F' - 'A') {
-               h = x - 'A' + 10;
-       } else {
+       h = value = hex_to_bin(src[0]);
+       if (value < 0)
                return -1;
-       }
-       h <<= 4;
 
        /* low part */
-       x = src[1];
-       if (x - '0' <= '9' - '0')
-               return h | (x - '0');
-       if (x - 'a' <= 'f' - 'a')
-               return h | (x - 'a' + 10);
-       if (x - 'A' <= 'F' - 'A')
-               return h | (x - 'A' + 10);
+       value = hex_to_bin(src[1]);
+       if (value >= 0)
+               return (h << 4) | value;
        return -1;
 }