ACPI: thinkpad-acpi: fix hotkey_get_tablet_mode

[Henrique de Moraes Holschuh]

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@xxxxxxxxxx>
Cc: Zdenek Kabelac <zdenek.kabelac@xxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
Cc: Lukas Hejtmanek <xhejtman@xxxxxxxxxxx>
---
 drivers/misc/thinkpad_acpi.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index bb269d0..6cb7812 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;
 }
 
 /*
-- 
1.5.4.2

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