diff options
| author | Amit Shah <amit.shah@redhat.com> | 2013-03-05 23:21:34 +0530 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-03-08 13:57:17 -0600 |
| commit | 7df4d4578f70b565870f353ba0b72f2f23781a09 (patch) | |
| tree | 579c41f76e409464a8d5a272ef7dddbc17301d0d /hw | |
| parent | fcfb4d6aae611d1f804d486d3c998000912c4c81 (diff) | |
virtio: console: add flow control
The virtio-serial-bus already has the logic to make flow control work
properly. Hook into the char layer's new ability to signal a backend is
writable again.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Message-id: abffa02235d55ca6e2489068c58971c8897e976c.1362505276.git.amit.shah@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio-console.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/hw/virtio-console.c b/hw/virtio-console.c index 46072a086f..b3ee074a87 100644 --- a/hw/virtio-console.c +++ b/hw/virtio-console.c @@ -20,6 +20,18 @@ typedef struct VirtConsole { CharDriverState *chr; } VirtConsole; +/* + * Callback function that's called from chardevs when backend becomes + * writable. + */ +static gboolean chr_write_unblocked(GIOChannel *chan, GIOCondition cond, + void *opaque) +{ + VirtConsole *vcon = opaque; + + virtio_serial_throttle_port(&vcon->port, false); + return FALSE; +} /* Callback function that's called when the guest sends us data */ static ssize_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len) @@ -48,6 +60,7 @@ static ssize_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len) * do_flush_queued_data(). */ ret = 0; + qemu_chr_fe_add_watch(vcon->chr, G_IO_OUT, chr_write_unblocked, vcon); } return ret; } |