net: designware: Pad small packets
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.fainelli@gmail.com>
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 9207324..6d53071 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -18,6 +18,7 @@
#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"
@@ -344,6 +345,8 @@
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;
@@ -370,6 +373,8 @@
return -EPERM;
}
+ length = max(length, ETH_ZLEN);
+
memcpy((void *)data_start, packet, length);
/* Flush data to be sent */