> Subject: [PATCH 5.1] rtw88: fix subscript above array bounds compiler warning > > 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); > -- Thanks. For this patch. Acked-by: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx> Yan-Hsuan
