staging: comedi: ni_tio: convert NI_M_Series_PFI_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 60ec33f..ee9c853 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -173,14 +173,7 @@ enum ni_m_series_gate_select {
        NI_M_Series_Logic_Low_Gate_Select = 0x1f,
 };
 #define NI_M_RTSI_GATE_SEL(x)          (((x) == 7) ? 0x1b : (0xb + (x)))
-
-static inline unsigned NI_M_Series_PFI_Gate_Select(unsigned n)
-{
-       BUG_ON(n > ni_m_series_max_pfi_channel);
-       if (n < 10)
-               return 1 + n;
-       return 0xb + n;
-}
+#define NI_M_PFI_GATE_SEL(x)           (((x) < 10) ? (1 + (x)) : (0xb + (x)))
 
 static inline unsigned Gi_Source_Select_Bits(unsigned source)
 {
@@ -1251,10 +1244,8 @@ ni_m_series_first_gate_to_generic_gate_source(unsigned ni_m_series_gate_select)
                if (i <= ni_m_series_max_rtsi_channel)
                        break;
                for (i = 0; i <= ni_m_series_max_pfi_channel; ++i) {
-                       if (ni_m_series_gate_select ==
-                           NI_M_Series_PFI_Gate_Select(i)) {
+                       if (ni_m_series_gate_select == NI_M_PFI_GATE_SEL(i))
                                return NI_GPCT_PFI_GATE_SELECT(i);
-                       }
                }
                if (i <= ni_m_series_max_pfi_channel)
                        break;