[PATCH 5.16 129/227] dpaa2-eth: Initialize mutex used in one step timestamping path

[Greg Kroah-Hartman]

From: Radu Bulie <radu-andrei.bulie@xxxxxxx>

commit 07dd44852be89386ab12210df90a2d78779f3bff upstream.

1588 Single Step Timestamping code path uses a mutex to
enforce atomicity for two events:
- update of ptp single step register
- transmit ptp event packet

Before this patch the mutex was not initialized. This
caused unexpected crashes in the Tx function.

Fixes: c55211892f463 ("dpaa2-eth: support PTP Sync packet one-step timestamping")
Signed-off-by: Radu Bulie <radu-andrei.bulie@xxxxxxx>
Reviewed-by: Ioana Ciornei <ioana.ciornei@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -4338,7 +4338,7 @@ static int dpaa2_eth_probe(struct fsl_mc
 	}
 
 	INIT_WORK(&priv->tx_onestep_tstamp, dpaa2_eth_tx_onestep_tstamp);
-
+	mutex_init(&priv->onestep_tstamp_lock);
 	skb_queue_head_init(&priv->tx_skbs);
 
 	priv->rx_copybreak = DPAA2_ETH_DEFAULT_COPYBREAK;