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 <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/staging/comedi/drivers/ni_tio.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_tio.c 
b/drivers/staging/comedi/drivers/ni_tio.c
index e613353..e1d7d4e 100644
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -154,12 +154,7 @@ static inline unsigned NI_M_Series_PFI_Clock(unsigned n)
 }
 
 static const unsigned ni_m_series_max_rtsi_channel = 7;
-static inline unsigned NI_M_Series_RTSI_Clock(unsigned n)
-{
-       BUG_ON(n > ni_m_series_max_rtsi_channel);
-
-       return (n == 7) ? 0x1b : (0xb + n);
-}
+#define NI_M_RTSI_CLK(x)               (((x) == 7) ? 0x1b : (0xb + (x)))
 
 enum ni_660x_gate_select {
        NI_660x_Source_Pin_i_Gate_Select = 0x0,
@@ -622,7 +617,7 @@ static unsigned ni_m_series_source_select_bits(unsigned int 
clock_source)
        default:
                for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
                        if (clock_select_bits == 
NI_GPCT_RTSI_CLOCK_SRC_BITS(i)) {
-                               ni_m_series_clock = NI_M_Series_RTSI_Clock(i);
+                               ni_m_series_clock = NI_M_RTSI_CLK(i);
                                break;
                        }
                }
@@ -791,7 +786,7 @@ static unsigned ni_m_series_clock_src_select(const struct 
ni_gpct *counter)
                break;
        default:
                for (i = 0; i <= ni_m_series_max_rtsi_channel; ++i) {
-                       if (input_select == NI_M_Series_RTSI_Clock(i)) {
+                       if (input_select == NI_M_RTSI_CLK(i)) {
                                clock_source = NI_GPCT_RTSI_CLOCK_SRC_BITS(i);
                                break;
                        }
-- 
1.9.3

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