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| author | Michael S. Tsirkin <mst@redhat.com> | 2010-09-02 17:47:43 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2010-09-06 14:47:56 +0300 |
| commit | a05e8a6e90c82cec67d16fed24da0fd04ec00f32 (patch) | |
| tree | 32b6d957e929b44b3590d4b06f19e2e5fb7cf5d0 /hw/e1000.c | |
| parent | ba5e7f82169f32ab8163c707d97c799ca09f8924 (diff) | |
| download | focaccia-qemu-a05e8a6e90c82cec67d16fed24da0fd04ec00f32.tar.gz focaccia-qemu-a05e8a6e90c82cec67d16fed24da0fd04ec00f32.zip | |
qemu: e1000 fix TOR math
Patch b0b900070c7cb29bbefb732ec00397abe5de6d73 made TOR valuer incorrect: the spec says it should always include the CRC field. No one seems to use this field, but better to stick to spec. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/e1000.c')
| -rw-r--r-- | hw/e1000.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/hw/e1000.c b/hw/e1000.c index 80b78bc618..7d7d14002f 100644 --- a/hw/e1000.c +++ b/hw/e1000.c @@ -345,7 +345,7 @@ is_vlan_txd(uint32_t txd_lower) /* FCS aka Ethernet CRC-32. We don't get it from backends and can't * fill it in, just pad descriptor length by 4 bytes unless guest - * told us to trip it off the packet. */ + * told us to strip it off the packet. */ static inline int fcs_len(E1000State *s) { @@ -690,9 +690,14 @@ e1000_receive(VLANClientState *nc, const uint8_t *buf, size_t size) s->mac_reg[GPRC]++; s->mac_reg[TPR]++; - n = s->mac_reg[TORL]; - if ((s->mac_reg[TORL] += size) < n) + /* TOR - Total Octets Received: + * This register includes bytes received in a packet from the <Destination + * Address> field through the <CRC> field, inclusively. + */ + n = s->mac_reg[TORL] + size + /* Always include FCS length. */ 4; + if (n < s->mac_reg[TORL]) s->mac_reg[TORH]++; + s->mac_reg[TORL] = n; n = E1000_ICS_RXT0; if ((rdt = s->mac_reg[RDT]) < s->mac_reg[RDH]) |