src/patches/suse-2.6.27.31/patches.arch/thinkpad_acpi-hotkey-notify-fix

   1 From: Jeff Mahoney <jeffm@suse.com>
   2 Subject: [PATCH] thinkpad_acpi: Fix oops with incompatible backlight interface
   3
   4  Mainline commit 2dba1b5d87e08a294da5cdfa4d32908000e9b085 (trenn's patch
   5  thinkpad_fingers_off_backlight_igd.patch added new users of
   6  ibm_backlight_device.
   7
   8  brightness_init() returns -errno on fatal errors and 1 if the interface
   9  is incompatible. This leaves ibm_backlight_device == NULL, which causes
  10  an oops in hotkey_notify().
  11
  12  This patch adds a check for ibm_backlight_device.
  13
  14 Signed-off-by: Jeff Mahoney <jeffm@suse.com>
  15 ---
  16  drivers/misc/thinkpad_acpi.c |    2 +-
  17  1 file changed, 1 insertion(+), 1 deletion(-)
  18
  19 --- a/drivers/misc/thinkpad_acpi.c
  20 +++ b/drivers/misc/thinkpad_acpi.c
  21 @@ -2401,7 +2401,7 @@ static void hotkey_notify(struct ibm_str
  22                 case 1:
  23                         /* 0x1000-0x1FFF: key presses */
  24                         scancode = hkey & 0xfff;
  25 -                       if (tp_features.bright_igdmode) {
  26 +                       if (tp_features.bright_igdmode && ibm_backlight_device) {
  27                                 /* ToDo:
  28                                  * Is there an already defined key?
  29                                  */