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authorMichael Büsch <m@bues.ch>2011-11-16 23:55:46 +0100
committerJohn W. Linville <linville@tuxdriver.com>2011-11-17 14:40:37 -0500
commit2d1618170eb493d18f66f2ac03775409a6fb97c6 (patch)
treed9620c49810aa36cf993d2390a24ab42f0d73700 /drivers/net/wireless/p54/p54spi.c
parent32d3a3922d617a5a685a5e2d24b20d0e88f192a9 (diff)
p54spi: Fix workqueue deadlock
priv->work must not be synced while priv->mutex is locked, because the mutex is taken in the work handler. Move cancel_work_sync down to after the device shutdown code. This is safe, because the work handler checks fw_state and bails out early in case of a race. Signed-off-by: Michael Buesch <m@bues.ch> Cc: <stable@vger.kernel.org> Acked-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/p54/p54spi.c')
-rw-r--r--drivers/net/wireless/p54/p54spi.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/wireless/p54/p54spi.c b/drivers/net/wireless/p54/p54spi.c
index dda97c54d28..78d0d698855 100644
--- a/drivers/net/wireless/p54/p54spi.c
+++ b/drivers/net/wireless/p54/p54spi.c
@@ -588,8 +588,6 @@ static void p54spi_op_stop(struct ieee80211_hw *dev)
WARN_ON(priv->fw_state != FW_STATE_READY);
- cancel_work_sync(&priv->work);
-
p54spi_power_off(priv);
spin_lock_irqsave(&priv->tx_lock, flags);
INIT_LIST_HEAD(&priv->tx_pending);
@@ -597,6 +595,8 @@ static void p54spi_op_stop(struct ieee80211_hw *dev)
priv->fw_state = FW_STATE_OFF;
mutex_unlock(&priv->mutex);
+
+ cancel_work_sync(&priv->work);
}
static int __devinit p54spi_probe(struct spi_device *spi)