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[net,4/4] sh_eth: Really fix padding of short frames on TX

Message ID 1425343988.4288.12.camel@xylophone.i.decadent.org.uk
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Ben Hutchings March 3, 2015, 12:53 a.m. UTC
My previous fix to clear padding of short frames used skb->len as the
DMA length, assuming that skb_padto() extended skb->len to include the
padding.  That isn't the case; we need to use skb_put_padto() instead.

(This wasn't immediately obvious because software padding isn't
actually needed on the R-Car H2.  We could make it conditional on
which chip is being driven, but it's probably not worth the effort.)

Reported-by: "Violeta Menéndez González" <violeta.menendez@codethink.co.uk>
Fixes: 612a17a54b50 ("sh_eth: Fix padding of short frames on TX")
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
---
 drivers/net/ethernet/renesas/sh_eth.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 3406cda57a45..736d5d1624a1 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2181,7 +2181,7 @@  static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	}
 	spin_unlock_irqrestore(&mdp->lock, flags);
 
-	if (skb_padto(skb, ETH_ZLEN))
+	if (skb_put_padto(skb, ETH_ZLEN))
 		return NETDEV_TX_OK;
 
 	entry = mdp->cur_tx % mdp->num_tx_ring;