3.5.7.23 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Ricardo Ribalda <ricardo.riba...@gmail.com>
commit 7167cf0e8cd10287b7912b9ffcccd9616f382922 upstream.
The dma descriptors indexes are only initialized on the probe function.
If a packet is on the buffer when temac_stop is called, the dma
descriptors indexes can be left on a incorrect state where no other
package can be sent.
So an interface could be left in an usable state after ifdow/ifup.
This patch makes sure that the descriptors indexes are in a proper
status when the device is open.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/net/ethernet/xilinx/ll_temac_main.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c
b/drivers/net/ethernet/xilinx/ll_temac_main.c
index 1eaf712..26e487b 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -308,6 +308,12 @@ static int temac_dma_bd_init(struct net_device *ndev)
lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1)));
lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p);
+ /* Init descriptor indexes */
+ lp->tx_bd_ci = 0;
+ lp->tx_bd_next = 0;
+ lp->tx_bd_tail = 0;
+ lp->rx_bd_ci = 0;
+
return 0;
out:
--
1.8.3.2
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