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>
---
v2: As suggested by David Miller:
- Remove unneded app0=0 on dma descriptors
- Move all code to temac_dma_bd_init
- Fix changelog
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 b88121f..0029148 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -297,6 +297,12 @@ 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:
--
1.8.4.rc3
--
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