tree 72d897f85b440b0ba970c0ae4780598b73ec752c
parent 190563f9a90c9df8ad32fc7f3e4b166deda949a6
author Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> 1345812630 +0100
committer Stefan Hajnoczi <stefanha@gmail.com> 1347608433 +0100

net: broadcast hub packets if at least one port can receive

In commit 60c07d933c66c4b30a83b7ccbc8a0cb3df1b2d0e ("net: fix
qemu_can_send_packet logic") the "VLAN" broadcast behavior was changed
to queue packets if any net client cannot receive.  It turns out that
this was not actually the right fix and just hides the real bug that
hw/usb/dev-network.c:usbnet_receive() clobbers its receive buffer when
called multiple times in a row.  The commit also introduced a new bug
that "VLAN" packets would not be sent if one of multiple net clients was
down.

The hw/usb/dev-network.c bug has since been fixed, so this patch reverts
broadcast behavior to send packets as long as one net client can
receive.  Packets simply get queued for the net clients that are
temporarily unable to receive.

Reported-by: Roy.Li <rongqing.li@windriver.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>