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[v3,08/14] dp8393x: Don't clobber packet checksum

Message ID e4fd3638021d2b469f4e786ea82d5b9284e8627b.1579474761.git.fthain@telegraphics.com.au
State New
Headers show
Series Fixes for DP8393X SONIC device emulation | expand

Commit Message

Finn Thain Jan. 19, 2020, 10:59 p.m. UTC 
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>
---
 hw/net/dp8393x.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index 0309365fda..947ceef37c 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;