diff options
| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2018-02-26 13:04:52 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-07-02 15:41:18 +0200 |
| commit | 76b004d10da09bb77a4343edf7b98b2d662fb4f2 (patch) | |
| tree | b5fa2752233f9445b8d9b3a369c16d347feaec7c | |
| parent | 66d26ddb235439c72ff2b5fc0b42e242a57ba315 (diff) | |
serial: Open non-block
On a real serial device, the open can block if the handshake
lines are in a particular state. If a QEMU is passing the serial
device to the guest, the QEMU startup is blocked opening the device
(with a symptom seen as a timeout from libvirt).
Open the serial port with O_NONBLOCK.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | chardev/char-serial.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/chardev/char-serial.c b/chardev/char-serial.c index ae548d28da..3299b46853 100644 --- a/chardev/char-serial.c +++ b/chardev/char-serial.c @@ -265,7 +265,8 @@ static void qmp_chardev_open_serial(Chardev *chr, ChardevHostdev *serial = backend->u.serial.data; int fd; - fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp); + fd = qmp_chardev_open_file_source(serial->device, O_RDWR | O_NONBLOCK, + errp); if (fd < 0) { return; } |