[U-Boot] [PATCH 3/3] net: davinci_emac: Invalidate only the received portion of a buffer

[Karl Beldan]

ATM when receiving a packet the whole buffer is invalidated, this change
optimizes this behaviour.

Signed-off-by: Karl Beldan <karl.beldan+oss at gmail.com>
---
 drivers/net/davinci_emac.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 55461b0..e26e727 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -677,13 +677,13 @@ static int davinci_eth_rcv_packet (struct eth_device *dev)
 			printf ("WARN: emac_rcv_pkt: Error in packet\n");
 		} else {
 			unsigned long tmp = (unsigned long)rx_curr_desc->buffer;
+			unsigned short len =
+				rx_curr_desc->buff_off_len & 0xffff;
 
-			invalidate_dcache_range(tmp, round_up(tmp + EMAC_RXBUF_SIZE,
-							      ARCH_DMA_MINALIGN));
-			net_process_received_packet(
-				rx_curr_desc->buffer,
-				rx_curr_desc->buff_off_len & 0xffff);
-			ret = rx_curr_desc->buff_off_len & 0xffff;
+			invalidate_dcache_range(tmp, round_up(tmp + len,
+						ARCH_DMA_MINALIGN));
+			net_process_received_packet(rx_curr_desc->buffer, len);
+			ret = len;
 		}
 
 		/* Ack received packet descriptor */
-- 
2.9.2