From a51897b6c1e517ea2ce95da59784e84c5992dd00 Mon Sep 17 00:00:00 2001
From: karl beldan <karl.beldan@gmail.com>
Date: Mon, 15 Aug 2016 17:23:01 +0000
Subject: [PATCH] net: davinci_emac: Invalidate only the received portion of a
buffer
ATM when receiving a packet the whole buffer is invalidated, this change
optimizes this behaviour.
Signed-off-by: Karl Beldan <karl.beldan+oss@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
---
drivers/net/davinci_emac.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 187137c8b4..6283487708 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -681,12 +681,12 @@ 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, tmp + EMAC_RXBUF_SIZE);
- 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, tmp + ALIGN(len, PKTALIGN));
+ net_process_received_packet(rx_curr_desc->buffer, len);
+ ret = len;
}
/* Ack received packet descriptor */
--
2.39.5