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net: designware: Pad small packets

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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>
This commit is contained in:
Florian Fainelli 2017-12-09 14:59:55 -08:00 • committed by Joe Hershberger
parent 137963d71a
commit 7a9ca9db40
1 changed files with 5 additions and 0 deletions
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5
drivers/net/designware.c
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@ -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 @@ 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;
@ -370,6 +373,8 @@ 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 */