[PATCH] sony-laptop: correct find_snc_handle failure checks

[Mattia Dongili <malattia@linux.it>]

Since bab7084c745bf4d75b760728387f375fd34dc683, find_snc_handle
returns -EINVAL, not -1.

Signed-off-by: Mattia Dongili <malattia@linux.it>
---

Hi Matthew,
this bug is a bug present in current 3.5-rc could you please pick this patch
up?
The patch will apply fine on top of the other series I sent, let me know if I
should rebase it on something else.

Thanks

 drivers/platform/x86/sony-laptop.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 3617858..f4fc73f 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -2555,19 +2555,19 @@ static void sony_nc_backlight_setup(void)
 	const struct backlight_ops *ops = NULL;
 	struct backlight_properties props;
 
-	if (sony_find_snc_handle(0x12f) != -1) {
+	if (sony_find_snc_handle(0x12f) >= 0) {
 		ops = &sony_backlight_ng_ops;
 		sony_bl_props.cmd_base = 0x0100;
 		sony_nc_backlight_ng_read_limits(0x12f, &sony_bl_props);
 		max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;
 
-	} else if (sony_find_snc_handle(0x137) != -1) {
+	} else if (sony_find_snc_handle(0x137) >= 0) {
 		ops = &sony_backlight_ng_ops;
 		sony_bl_props.cmd_base = 0x0100;
 		sony_nc_backlight_ng_read_limits(0x137, &sony_bl_props);
 		max_brightness = sony_bl_props.maxlvl - sony_bl_props.offset;
 
-	} else if (sony_find_snc_handle(0x143) != -1) {
+	} else if (sony_find_snc_handle(0x143) >= 0) {
 		ops = &sony_backlight_ng_ops;
 		sony_bl_props.cmd_base = 0x3000;
 		sony_nc_backlight_ng_read_limits(0x143, &sony_bl_props);
-- 
1.7.10