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>
diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index 6d82dc6..34d0c69 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -662,8 +662,8 @@
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);