My compiler complains about: drivers/net/wireless/realtek/rtw88/phy.c: In function ‘rtw_phy_rf_power_2_rssi’: drivers/net/wireless/realtek/rtw88/phy.c:430:26: warning: array subscript is above array bounds [-Warray-bounds] linear = db_invert_table[i][j]; According to comment power_db should be in range 1 ~ 96 . To fix add check for boundaries before access the array. Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> --- RFC -> v1 - add check before accessing the array insted of rtw_phy_power_2_db() change. v1 -> v2: - return 1 for power_db < 1 drivers/net/wireless/realtek/rtw88/phy.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wireless/realtek/rtw88/phy.c b/drivers/net/wireless/realtek/rtw88/phy.c index 4381b360b5b5..9ca52a4d025a 100644 --- a/drivers/net/wireless/realtek/rtw88/phy.c +++ b/drivers/net/wireless/realtek/rtw88/phy.c @@ -423,6 +423,11 @@ static u64 rtw_phy_db_2_linear(u8 power_db) u8 i, j; u64 linear; + if (power_db > 96) + power_db = 96; + else if (power_db < 1) + return 1; + /* 1dB ~ 96dB */ i = (power_db - 1) >> 3; j = (power_db - 1) - (i << 3); -- 2.20.1
