From: Thomas Chou <thomas@wytron.com.tw>
To: netdev@vger.kernel.org
Cc: thierry.reding@avionic-design.de,
Nios2 development list <nios2-dev@sopc.et.ntust.edu.tw>,
linux-kernel@vger.kernel.org, Thomas Chou <thomas@wytron.com.tw>
Subject: [PATCH] ethoc: limit the number of buffers to 128
Date: Tue, 6 Oct 2009 21:25:25 +0800 [thread overview]
Message-ID: <1254835525-2529-1-git-send-email-thomas@wytron.com.tw> (raw)
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>
---
drivers/net/ethoc.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
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 @@ 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);
--
1.6.2.5
next reply other threads:[~2009-10-06 13:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-06 13:25 Thomas Chou [this message]
2009-10-07 10:42 ` [PATCH] ethoc: limit the number of buffers to 128 David Miller
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