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-rw-r--r--drivers/net/mv643xx_eth.c9
-rw-r--r--include/linux/mv643xx_eth.h5
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index e345ec8cb473..73bb8ea6f54a 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -289,6 +289,7 @@ struct mv643xx_eth_shared_private {
unsigned int t_clk;
int extended_rx_coal_limit;
int tx_bw_control;
+ int tx_csum_limit;
};
#define TX_BW_CONTROL_ABSENT 0
@@ -776,13 +777,16 @@ static int txq_submit_skb(struct tx_queue *txq, struct sk_buff *skb)
l4i_chk = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ int hdr_len;
int tag_bytes;
BUG_ON(skb->protocol != htons(ETH_P_IP) &&
skb->protocol != htons(ETH_P_8021Q));
- tag_bytes = (void *)ip_hdr(skb) - (void *)skb->data - ETH_HLEN;
- if (unlikely(tag_bytes & ~12)) {
+ hdr_len = (void *)ip_hdr(skb) - (void *)skb->data;
+ tag_bytes = hdr_len - ETH_HLEN;
+ if (skb->len - hdr_len > mp->shared->tx_csum_limit ||
+ unlikely(tag_bytes & ~12)) {
if (skb_checksum_help(skb) == 0)
goto no_csum;
kfree_skb(skb);
@@ -2666,6 +2670,7 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
* Detect hardware parameters.
*/
msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
+ msp->tx_csum_limit = pd->tx_csum_limit ? pd->tx_csum_limit : 9 * 1024;
infer_hw_params(msp);
platform_set_drvdata(pdev, msp);
diff --git a/include/linux/mv643xx_eth.h b/include/linux/mv643xx_eth.h
index cbbbe9bfecad..30b0c4e78f91 100644
--- a/include/linux/mv643xx_eth.h
+++ b/include/linux/mv643xx_eth.h
@@ -19,6 +19,11 @@ struct mv643xx_eth_shared_platform_data {
struct mbus_dram_target_info *dram;
struct platform_device *shared_smi;
unsigned int t_clk;
+ /*
+ * Max packet size for Tx IP/Layer 4 checksum, when set to 0, default
+ * limit of 9KiB will be used.
+ */
+ int tx_csum_limit;
};
#define MV643XX_ETH_PHY_ADDR_DEFAULT 0