From ae0457f76a2a1e67cd0231e978c19911fe386064 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 7 Nov 2009 17:40:52 +0000 Subject: b43: work around a locking issue, might fix #5996 SVN-Revision: 18338 --- package/mac80211/patches/405-b43_locking_fix.patch | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 package/mac80211/patches/405-b43_locking_fix.patch (limited to 'package/mac80211') diff --git a/package/mac80211/patches/405-b43_locking_fix.patch b/package/mac80211/patches/405-b43_locking_fix.patch new file mode 100644 index 0000000000..c90890a7a7 --- /dev/null +++ b/package/mac80211/patches/405-b43_locking_fix.patch @@ -0,0 +1,23 @@ +Subject: [PATCH] b43: work around a locking issue in ->set_tim() + +ops->set_tim() must be atomic, so b43 trying to acquire a mutex leads +to a kernel crash. This patch trades an easy to trigger crash in AP +mode for an unlikely race condition. According to Michael, the real +fix would be to allow set_tim() callbacks to sleep, since b43 is +not the only driver that needs to sleep in all callbacks. + +Signed-off-by: Felix Fietkau + +--- a/drivers/net/wireless/b43/main.c ++++ b/drivers/net/wireless/b43/main.c +@@ -4534,9 +4534,8 @@ static int b43_op_beacon_set_tim(struct + { + struct b43_wl *wl = hw_to_b43_wl(hw); + +- mutex_lock(&wl->mutex); ++ /* FIXME: add locking */ + b43_update_templates(wl); +- mutex_unlock(&wl->mutex); + + return 0; + } -- cgit v1.2.3