staging: comedi: ni_tio: convert NI_660x_Up_Down_Pin_Second_Gate_Select() to a macro

The BUG_ON() in this function can never happen.

For aesthetics, rename this CamelCase inline function and convert it into
a simple macro.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c
index 2347612..247e3da 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -186,12 +186,7 @@ enum ni_660x_second_gate_select {
        NI_660x_Logic_Low_Second_Gate_Select = 0x1f,
 };
 static const unsigned ni_660x_max_up_down_pin = 7;
-static inline unsigned NI_660x_Up_Down_Pin_Second_Gate_Select(unsigned n)
-{
-       BUG_ON(n > ni_660x_max_up_down_pin);
-       return 0x2 + n;
-}
-
+#define NI_660X_UD_PIN_GATE2_SEL(x)    (0x2 + (x))
 #define NI_660X_RTSI_GATE2_SEL(x)      (0xb + (x))
 
 static const unsigned int counter_status_mask =
@@ -1269,10 +1264,8 @@ ni_660x_second_gate_to_generic_gate_source(unsigned ni_660x_gate_select)
                if (i <= ni_660x_max_rtsi_channel)
                        break;
                for (i = 0; i <= ni_660x_max_up_down_pin; ++i) {
-                       if (ni_660x_gate_select ==
-                           NI_660x_Up_Down_Pin_Second_Gate_Select(i)) {
+                       if (ni_660x_gate_select == NI_660X_UD_PIN_GATE2_SEL(i))
                                return NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i);
-                       }
                }
                if (i <= ni_660x_max_up_down_pin)
                        break;