From: Vlastimil Setka <se...@vsis.cz>
Altera TSE MAC rx DMA transfer starts with the 2 additional bytes for IP
payload alignment. This patch fixes tse_rx() function loop which reads DMA
rx status and extracts packet length from it. Status signalises a whole DMA
transfer length, which is 2 bytes longer than the packet itself.
Signed-off-by: Vlastimil Setka <se...@vsis.cz>
---
drivers/net/ethernet/altera/altera_tse_main.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/altera/altera_tse_main.c
b/drivers/net/ethernet/altera/altera_tse_main.c
index 90a7630..592ef28 100644
--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -391,6 +391,12 @@ static int tse_rx(struct altera_tse_private *priv, int
limit)
"RCV pktstatus %08X pktlength %08X\n",
pktstatus, pktlength);
+ /* DMA trasfer from TSE starts with 2 aditional bytes for
+ * IP payload alignment. Status returned by get_rx_status()
+ * contains DMA transfer length. Packet is 2 bytes shorter.
+ */
+ pktlength -= 2;
+
count++;
next_entry = (++priv->rx_cons) % priv->rx_ring_size;
--
1.8.1.2
--
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