From: Johannes Berg <johannes.berg@xxxxxxxxx>
[ Upstream commit 1944015fe9c1d9fa5e9eb7ffbbb5ef8954d6753b ]
Coverity reported the strange "if (~...)" condition that's
always true. It suggested that ! was intended instead of ~,
but upon further analysis I'm convinced that what really was
intended was a comparison to 0xff/0xffff (in HT/VHT cases
respectively), since this indicates that all of the rates
are enabled.
Change the comparison accordingly.
I'm guessing this never really mattered because a reset to
not having a rate mask is basically equivalent to having a
mask that enables all rates.
Reported-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Fixes: 2ffbe6d33366 ("mac80211: fix and optimize MCS mask handling")
Fixes: b119ad6e726c ("mac80211: add rate mask logic for vht rates")
Reviewed-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210212112213.36b38078f569.I8546a20c80bc1669058eb453e213630b846e107b@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/mac80211/cfg.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 0b82d8da4ab0..0563bde0c285 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2752,14 +2752,14 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
continue;
for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
- if (~sdata->rc_rateidx_mcs_mask[i][j]) {
+ if (sdata->rc_rateidx_mcs_mask[i][j] != 0xff) {
sdata->rc_has_mcs_mask[i] = true;
break;
}
}
for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
- if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
+ if (sdata->rc_rateidx_vht_mcs_mask[i][j] != 0xffff) {
sdata->rc_has_vht_mcs_mask[i] = true;
break;
}
--
2.30.1
