Make sure that we pad small packets to a minimum length of 60 bytes
(without FCS). This is necessary to interface with Ethernet switches
that will reject RUNT frames unless padded correctly.
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
drivers/net/designware.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 036d231071ca..56fa0ebd8f31 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -17,6 +17,7 @@
#include <pci.h>
#include <linux/compiler.h>
#include <linux/err.h>
+#include <linux/kernel.h>
#include <asm/io.h>
#include <power/regulator.h>
#include "designware.h"
@@ -343,6 +344,8 @@ int designware_eth_enable(struct dw_eth_dev *priv)
return 0;
}
+#define ETH_ZLEN 60
+
static int _dw_eth_send(struct dw_eth_dev *priv, void *packet, int length)
{
struct eth_dma_regs *dma_p = priv->dma_regs_p;
@@ -369,6 +372,8 @@ static int _dw_eth_send(struct dw_eth_dev *priv, void
*packet, int length)
return -EPERM;
}
+ length = max(length, ETH_ZLEN);
+
memcpy((void *)data_start, packet, length);
/* Flush data to be sent */
--
2.14.1
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