staging: rtl8712: simplify evm_db2percentage()

Use clamp() to simplify function evm_db2percentage() and reduce object
file size.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200118195305.16685-3-straube.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 00ea0be..1167739 100644 (file)
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -663,17 +663,11 @@ static u8 evm_db2percentage(s8 value)
        /*
         * -33dB~0dB to 0%~99%
         */
-       s8 ret_val;
+       s8 ret_val = clamp(-value, 0, 33) * 3;
 
-       ret_val = value;
-       if (ret_val >= 0)
-               ret_val = 0;
-       if (ret_val <= -33)
-               ret_val = -33;
-       ret_val = -ret_val;
-       ret_val *= 3;
        if (ret_val == 99)
                ret_val = 100;
+
        return ret_val;
 }