git: c43bd922a772 - stable/14 - LinuxKPI: 802.11: stop queues during key updates

The branch stable/14 has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=c43bd922a7724d5fd6919e6bbd222566f7a483f1

commit c43bd922a7724d5fd6919e6bbd222566f7a483f1
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2025-06-05 21:47:08 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2025-06-10 23:40:38 +0000

    LinuxKPI: 802.11: stop queues during key updates
    
    When beginning key updates do stop and afterwards re-enable the tx queues
    to avoid packets being passed to the driver.  This is a theoretical
    problem at this point but helps some cases.  These functions will likely
    need refinement in the future.
    
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit db480c29879cac1afba1d887d7b8871aa4eef6db)
---
 sys/compat/linuxkpi/common/src/linux_80211.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sys/compat/linuxkpi/common/src/linux_80211.c b/sys/compat/linuxkpi/common/src/linux_80211.c
index be671a2ed7a3..1b1e5721d7b2 100644
--- a/sys/compat/linuxkpi/common/src/linux_80211.c
+++ b/sys/compat/linuxkpi/common/src/linux_80211.c
@@ -174,6 +174,7 @@ static void lkpi_ieee80211_free_skb_mbuf(void *);
 #ifdef LKPI_80211_WME
 static int lkpi_wme_update(struct lkpi_hw *, struct ieee80211vap *, bool);
 #endif
+static void lkpi_ieee80211_wake_queues_locked(struct ieee80211_hw *);
 
 static const char *
 lkpi_rate_info_bw_to_str(enum rate_info_bw bw)
@@ -1631,6 +1632,11 @@ lkpi_iv_key_update_begin(struct ieee80211vap *vap)
 		refcount_acquire(&lvif->ic_unlocked);
 	if (ntislocked)
 		refcount_acquire(&lvif->nt_unlocked);
+
+	/*
+	 * Stop the queues while doing key updates.
+	 */
+	ieee80211_stop_queues(hw);
 }
 
 static void
@@ -1649,6 +1655,11 @@ lkpi_iv_key_update_end(struct ieee80211vap *vap)
 	lvif = VAP_TO_LVIF(vap);
 	nt = &ic->ic_sta;
 
+	/*
+	 * Re-enabled the queues after the key update.
+	 */
+	lkpi_ieee80211_wake_queues_locked(hw);
+
 	icislocked = IEEE80211_IS_LOCKED(ic);
 	MPASS(!icislocked);
 	ntislocked = IEEE80211_NODE_IS_LOCKED(nt);