mac80211: driver can remain on channel if not using chan_ctx

Some of the drivers are not using channel context, but let the stack to control/switch channels instead. For such cases, driver can still remain on channel because the mac80211 stack actually supports it. The stack will check if the driver is using chan_ctx and has ops->remain_on_channel been hooked. Otherwise it will start its ROC work to remain on channel. So, even if the driver is not using chan_ctx, the driver is still capable of doing remain on channel.

Yan-Hsuan Chuang committed 6 years ago

Commit 8fa180b1 parent 306b79e1 file · +1 −1Browse files

Unified · Split

net/mac80211/main.c+1−1

@@ -576,7 +576,7 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, · 575 unmodified lines
576	WIPHY_FLAG_REPORTS_OBSS \|	576	WIPHY_FLAG_REPORTS_OBSS \|
577	WIPHY_FLAG_OFFCHAN_TX;	577	WIPHY_FLAG_OFFCHAN_TX;
578		578
579	if (ops->remain_on_channel)	579	if (!use_chanctx \|\| ops->remain_on_channel)
580	wiphy->flags \|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;	580	wiphy->flags \|= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
581		581
582	wiphy->features \|= NL80211_FEATURE_SK_TX_STATUS \|	582	wiphy->features \|= NL80211_FEATURE_SK_TX_STATUS \|