diff options
| author | Karthikeyan Kathirvel <kathirve@codeaurora.org> | 2021-03-11 06:29:07 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2021-03-16 21:20:47 +0100 |
| commit | 041c881a0ba8a75f71118bd9766b78f04beed469 (patch) | |
| tree | deaabc9c937c2c5a6c49ce5ca0c445e63a6bfd22 | |
| parent | nl80211: fix locking for wireless device netns change (diff) | |
| download | linux-041c881a0ba8a75f71118bd9766b78f04beed469.tar.xz linux-041c881a0ba8a75f71118bd9766b78f04beed469.zip | |
mac80211: choose first enabled channel for monitor
Even if the first channel from sband channel list is invalid
or disabled mac80211 ends up choosing it as the default channel
for monitor interfaces, making them not usable.
Fix this by assigning the first available valid or enabled
channel instead.
Signed-off-by: Karthikeyan Kathirvel <kathirve@codeaurora.org>
Link: https://lore.kernel.org/r/1615440547-7661-1-git-send-email-kathirve@codeaurora.org
[reword commit message, comment, code cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/mac80211/main.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 4f3f8bb58e76..1b9c82616606 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -973,8 +973,19 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) continue; if (!dflt_chandef.chan) { + /* + * Assign the first enabled channel to dflt_chandef + * from the list of channels + */ + for (i = 0; i < sband->n_channels; i++) + if (!(sband->channels[i].flags & + IEEE80211_CHAN_DISABLED)) + break; + /* if none found then use the first anyway */ + if (i == sband->n_channels) + i = 0; cfg80211_chandef_create(&dflt_chandef, - &sband->channels[0], + &sband->channels[i], NL80211_CHAN_NO_HT); /* init channel we're on */ if (!local->use_chanctx && !local->_oper_chandef.chan) { |