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authorJohannes Berg <johannes.berg@intel.com>2021-02-12 13:22:14 +0300
committerJohannes Berg <johannes.berg@intel.com>2021-03-16 23:13:06 +0300
commit1944015fe9c1d9fa5e9eb7ffbbb5ef8954d6753b (patch)
treebdde6403baf3a8f601158bc8516bb2882f6fa2de /net/mac80211
parent13832ae2755395b2585500c85b64f5109a44227e (diff)
downloadlinux-1944015fe9c1d9fa5e9eb7ffbbb5ef8954d6753b.tar.xz
mac80211: fix rate mask reset
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@canonical.com> 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@canonical.com> Link: https://lore.kernel.org/r/20210212112213.36b38078f569.I8546a20c80bc1669058eb453e213630b846e107b@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/cfg.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index c4c70e30ad7f..68a0de02b561 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2950,14 +2950,14 @@ 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;
}