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 <lultimouomo@gmail.com>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Len Brown <len.brown@intel.com>
Cc: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index a7f66f8..ab85ef4 100644 (file)
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -367,7 +367,8 @@ 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);
 }
 
 /*