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net/designware: add explicit reset of {tx|rx}_currdescnum

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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".

Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Alexey Brodkin 2014-01-13 13:28:38 +04:00 committed by Tom Rini
parent bde237368a
commit 74cb708d58
1 changed files with 2 additions and 0 deletions
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2
drivers/net/designware.c
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@ -52,6 +52,7 @@ static void tx_descs_init(struct eth_device *dev)
desc_p->dmamac_next = &desc_table_p[0]; desc_p->dmamac_next = &desc_table_p[0];
writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr); writel((ulong)&desc_table_p[0], &dma_p->txdesclistaddr);
priv->tx_currdescnum = 0;
} }
static void rx_descs_init(struct eth_device *dev) static void rx_descs_init(struct eth_device *dev)
@ -79,6 +80,7 @@ static void rx_descs_init(struct eth_device *dev)
desc_p->dmamac_next = &desc_table_p[0]; desc_p->dmamac_next = &desc_table_p[0];
writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr); writel((ulong)&desc_table_p[0], &dma_p->rxdesclistaddr);
priv->rx_currdescnum = 0;
} }
static void descs_init(struct eth_device *dev) static void descs_init(struct eth_device *dev)