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From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: netdev@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Subject: [PATCH 2/2] sh_eth: fix RX buffer size calculation
Date: Sat, 24 Oct 2015 00:46:40 +0300	[thread overview]
Message-ID: <1571476.HbCo5gVB8j@wasted.cogentembedded.com> (raw)
In-Reply-To: <2249923.hKhT9K6gME@wasted.cogentembedded.com>

The RX buffer size calulation failed to account for the length granularity
(which is now 32 bytes)...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

---
 drivers/net/ethernet/renesas/sh_eth.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: net/drivers/net/ethernet/renesas/sh_eth.c
===================================================================
--- net.orig/drivers/net/ethernet/renesas/sh_eth.c
+++ net/drivers/net/ethernet/renesas/sh_eth.c
@@ -1127,7 +1127,7 @@ static void sh_eth_ring_format(struct ne
 	struct sh_eth_txdesc *txdesc = NULL;
 	int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring;
 	int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
-	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN - 1;
+	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
 	dma_addr_t dma_addr;
 
 	mdp->cur_rx = 0;
@@ -1450,7 +1450,7 @@ static int sh_eth_rx(struct net_device *
 	struct sk_buff *skb;
 	u16 pkt_len = 0;
 	u32 desc_status;
-	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN - 1;
+	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
 	dma_addr_t dma_addr;
 
 	boguscnt = min(boguscnt, *quota);

  parent reply	other threads:[~2015-10-23 21:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-23 21:44 [PATCH 0/2] sh_eth: RX buffer alignment fixes Sergei Shtylyov
2015-10-23 21:46 ` [PATCH 1/2] sh_eth: fix RX buffer size alignment Sergei Shtylyov
2015-10-23 21:46 ` Sergei Shtylyov [this message]
2015-10-27  1:32 ` [PATCH 0/2] sh_eth: RX buffer alignment fixes David Miller
2015-10-29 19:58   ` Sergei Shtylyov

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