sony-laptop: add some debug printk useful for bug reports

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

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 13d8d63bcca9..5cd39af376d9 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -733,22 +733,30 @@ static int sony_find_snc_handle(int handle)
 
         for (i = 0x20; i < 0x30; i++) {
                 acpi_callsetfunc(sony_nc_acpi_handle, "SN00", i, &result);
-                if (result == handle)
+                if (result == handle) {
+                        dprintk("found handle 0x%.4x (offset: 0x%.2x)\n",
+                                        handle, i - 0x20);
                         return i-0x20;
+                }
         }
 
+        dprintk("handle 0x%.4x not found\n", handle);
         return -1;
 }
 
 static int sony_call_snc_handle(int handle, int argument, int *result)
 {
+        int ret = 0;
         int offset = sony_find_snc_handle(handle);
 
         if (offset < 0)
                 return -1;
 
-        return acpi_callsetfunc(sony_nc_acpi_handle, "SN07", offset | argument,
-                                result);
+        ret = acpi_callsetfunc(sony_nc_acpi_handle, "SN07", offset | argument,
+                        result);
+        dprintk("called SN07 with 0x%.4x (result: 0x%.4x)\n", offset | argument,
+                        *result);
+        return ret;
 }
 
 /*