ACPI: thinkpad-acpi: fix hotkey_get_tablet_mode

I used the wrong return convention on hotkey_get_tablet_mode(), breaking a lot
of stuff.  Bad Henrique!

Fix it to return the status in the parameter-by-reference, and IO status on
the function return value.  Duh.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index bb269d0c677e..6cb781262f94 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1078,7 +1078,8 @@ static int hotkey_get_tablet_mode(int *status)
         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
                 return -EIO;
 
-        return ((s & TP_HOTKEY_TABLET_MASK) != 0);
+        *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
+        return 0;
 }
 
 /*