eeepc-laptop: don't enable camera at startup if it's already on.

Switching the camera takes 500ms, checking if it's on is almost free...
The BIOS remembers the setting through reboots, so there's good chance the
camera is already enabled.

Signed-off-by: Luca Niccoli <[email protected]>
Cc: Corentin Chary <[email protected]>
Cc: Alan Jenkins <[email protected]>
Cc: Matthew Garrett <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Corentin Chary <[email protected]>
Signed-off-by: Len Brown <[email protected]>

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 789d6ae003fb6a0a07549b3663274d96e7a47893..4226e535273874fb06aea0344c4c8ce00a8b957c 100644 (file)
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -356,7 +356,8 @@ static void __devinit eeepc_enable_camera(void)
         * If the following call to set_acpi() fails, it's because there's no
         * camera so we can ignore the error.
         */
-       set_acpi(CM_ASL_CAMERA, 1);
+       if (get_acpi(CM_ASL_CAMERA) == 0)
+               set_acpi(CM_ASL_CAMERA, 1);
 }
 
 /*