-----Original Message-----
From: Martin Blumenstingl [mailto:martin.blumenstingl@googlemail.com]
Sent: Sunday, July 18, 2021 4:41 AM
To: linux-wireless@vger.kernel.org
Cc: tony0620emma@gmail.com; kvalo@codeaurora.org; johannes@sipsolutions.net; netdev@vger.kernel.org;
linux-kernel@vger.kernel.org; Neo Jou; Jernej Skrabec; Martin Blumenstingl
Subject: [PATCH RFC v1 1/7] mac80211: Add stations iterator where the iterator function may sleep

ieee80211_iterate_active_interfaces() and
ieee80211_iterate_active_interfaces_atomic() already exist, where the
former allows the iterator function to sleep. Add
ieee80211_iterate_stations() which is similar to
ieee80211_iterate_stations_atomic() but allows the iterator to sleep.
This is needed for adding SDIO support to the rtw88 driver. Some
interators there are reading or writing registers. With the SDIO ops
(sdio_readb, sdio_writeb and friends) this means that the iterator
function may sleep.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 include/net/mac80211.h | 18 ++++++++++++++++++
 net/mac80211/util.c    | 13 +++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index d8a1d09a2141..77de89690008 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h

@@ -5575,6 +5575,24 @@ void ieee80211_iterate_active_interfaces_mtx(struct ieee80211_hw *hw,
 						struct ieee80211_vif *vif),
 					     void *data);

+/**
+ * ieee80211_iterate_stations_atomic - iterate stations