From 8a56b5ce774e4fd9aaa8959a706fc3bb226bf3d8 Mon Sep 17 00:00:00 2001 From: Michael Straube Date: Thu, 31 Mar 2022 23:41:46 +0200 Subject: [PATCH] staging: rtl8723bs: refactor rtw_ch2freq() Convert the array ch_freq_map to a simple integer array and use the indices as channel numbers. This simplifies the code and avoids looping through the array to get the frequency. To avoid out of bounds array access return a default value for invalid channel values, like the original code did. Signed-off-by: Michael Straube Link: https://lore.kernel.org/r/20220331214146.15161-3-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8723bs/core/rtw_rf.c | 40 +++++++++++-------------- 1 file changed, 18 insertions(+), 22 deletions(-) diff --git a/drivers/staging/rtl8723bs/core/rtw_rf.c b/drivers/staging/rtl8723bs/core/rtw_rf.c index 7e4bf42fd1acd..4f120c894998d 100644 --- a/drivers/staging/rtl8723bs/core/rtw_rf.c +++ b/drivers/staging/rtl8723bs/core/rtw_rf.c @@ -8,31 +8,27 @@ #include #include - -struct ch_freq { - u32 channel; - u32 frequency; -}; - -static struct ch_freq ch_freq_map[] = { - {1, 2412}, {2, 2417}, {3, 2422}, {4, 2427}, {5, 2432}, - {6, 2437}, {7, 2442}, {8, 2447}, {9, 2452}, {10, 2457}, - {11, 2462}, {12, 2467}, {13, 2472}, {14, 2484}, +static const u32 ch_freq_map[] = { + 2412, + 2417, + 2422, + 2427, + 2432, + 2437, + 2442, + 2447, + 2452, + 2457, + 2462, + 2467, + 2472, + 2484 }; u32 rtw_ch2freq(u32 channel) { - u8 i; - u32 freq = 0; - - for (i = 0; i < ARRAY_SIZE(ch_freq_map); i++) { - if (channel == ch_freq_map[i].channel) { - freq = ch_freq_map[i].frequency; - break; - } - } - if (i == ARRAY_SIZE(ch_freq_map)) - freq = 2412; + if (channel == 0 || channel > ARRAY_SIZE(ch_freq_map)) + return 2412; - return freq; + return ch_freq_map[channel - 1]; } -- 2.30.2