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ethoc: limit the number of buffers to 128 

Only 128 buffer descriptors are supported in the core. Limit the
number in case we have more memory.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Chou 2009-10-06 03:25:25 +00:00 committed by David S. Miller
parent 0baa080c75
commit a4d63a9437
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethoc.c
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@ -662,8 +662,8 @@ static int ethoc_open(struct net_device *dev)
if (ret)
return ret;
/* calculate the number of TX/RX buffers */
num_bd = (dev->mem_end - dev->mem_start + 1) / ETHOC_BUFSIZ;
/* calculate the number of TX/RX buffers, maximum 128 supported */
num_bd = min(128, (dev->mem_end - dev->mem_start + 1) / ETHOC_BUFSIZ);
priv->num_tx = max(min_tx, num_bd / 4);
priv->num_rx = num_bd - priv->num_tx;
ethoc_write(priv, TX_BD_NUM, priv->num_tx);