Driver "init" function might be called multiple times.
On every "init" Tx/Rx buffer descriptors are initialized: "descs_init"
-> "{tx|rx}_descs_init".
In its turn those init functions set MAC's "{tx|rx}desclistaddr" to
point on the first buffer descriptor in the list.
So CPU to start operation from the first buffer descriptor as well after
every "init" we have to reset "{tx|rx}_currdescnum".
[Original U-Boot patch by Alexey Brodkin <abrodkin@xxxxxxxxxxxx>]
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/net/designware.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 6702d4c..bd20a87 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -176,6 +176,7 @@ static void tx_descs_init(struct eth_device *dev)
desc_p->dmamac_next = &desc_table_p[0];
writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
+ priv->tx_currdescnum = 0;
}
static void rx_descs_init(struct eth_device *dev)
@@ -207,6 +208,7 @@ static void rx_descs_init(struct eth_device *dev)
desc_p->dmamac_next = &desc_table_p[0];
writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
+ priv->rx_currdescnum = 0;
}
static void descs_init(struct eth_device *dev)
--
2.10.1
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