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| author | Felix Fietkau <nbd@openwrt.org> | 2009-11-07 17:40:52 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2009-11-07 17:40:52 +0000 |
| commit | ae0457f76a2a1e67cd0231e978c19911fe386064 (patch) | |
| tree | 490d856f89871be3b4d902366b55c7942d212d95 | |
| parent | 2e72f3b26934dbebf8793dfb7c32b33d3e780fde (diff) | |
| download | upstream-ae0457f76a2a1e67cd0231e978c19911fe386064.tar.gz upstream-ae0457f76a2a1e67cd0231e978c19911fe386064.tar.bz2 upstream-ae0457f76a2a1e67cd0231e978c19911fe386064.zip | |
b43: work around a locking issue, might fix #5996
SVN-Revision: 18338
| -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 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 <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; + } |