[PATCH 34/78] dp8393x: Don't clobber packet checksum

[Michael Roth]

From: Finn Thain <fthain@telegraphics.com.au>

A received packet consumes pkt_size bytes in the buffer and the frame
checksum that's appended to it consumes another 4 bytes. The Receive
Buffer Address register takes the former quantity into account but
not the latter. So the next packet written to the buffer overwrites
the frame checksum. Fix this.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit bae112b80c9c42cea21ee7623c283668c3451c2e)
*drop context dep. on 19f70347731
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/net/dp8393x.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index ca8088c839..315b4ad844 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -816,6 +816,7 @@ static ssize_t dp8393x_receive(NetClientState *nc, const 
uint8_t * buf,
     address += rx_len;
     address_space_rw(&s->as, address,
         MEMTXATTRS_UNSPECIFIED, (uint8_t *)&checksum, 4, 1);
+    address += 4;
     rx_len += 4;
     s->regs[SONIC_CRBA1] = address >> 16;
     s->regs[SONIC_CRBA0] = address & 0xffff;
-- 
2.17.1