diff options
| -rw-r--r-- | package/mac80211/patches/405-b43_locking_fix.patch | 23 |
1 files changed, 23 insertions, 0 deletions
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 000000000..c90890a7a --- /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 <nbd@openwrt.org> + +--- 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; + } |