sony-laptop: adjust error handling in finding SNC handles

All handles must be greater than 0, also return more meaningful error
codes on invalid conditions.

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index c3f54ad8125c..2b72e476dfff 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -870,8 +870,8 @@ static int sony_find_snc_handle(int handle)
         int i;
 
         /* not initialized yet, return early */
-        if (!handles)
-                return -1;
+        if (!handles || !handle)
+                return -EINVAL;
 
         for (i = 0; i < 0x10; i++) {
                 if (handles->cap[i] == handle) {
@@ -881,7 +881,7 @@ static int sony_find_snc_handle(int handle)
                 }
         }
         dprintk("handle 0x%.4x not found\n", handle);
-        return -1;
+        return -EINVAL;
 }
 
 static int sony_call_snc_handle(int handle, int argument, int *result)
@@ -890,7 +890,7 @@ static int sony_call_snc_handle(int handle, int argument, int *result)
         int offset = sony_find_snc_handle(handle);
 
         if (offset < 0)
-                return -1;
+                return offset;
 
         arg = offset | argument;
         ret = sony_nc_int_call(sony_nc_acpi_handle, "SN07", &arg, result);