diff options
| author | Roger Pau Monne <roger.pau@citrix.com> | 2014-05-23 17:57:49 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-06-30 15:04:34 +0200 |
| commit | e02bc6de30c44fd668dc0d6e1cd1804f2eed3ed3 (patch) | |
| tree | 248484486b6a64e6c79a4560bec751d6130ec505 /hw/char/cadence_uart.c | |
| parent | 9328cfd2fe4a7ff86a41b2c26ea33974241d7d4e (diff) | |
serial: poll the serial console with G_IO_HUP
On FreeBSD polling a master pty while the other end is not connected
with G_IO_OUT only results in an endless wait. This is different from
the Linux behaviour, that returns immediately. In order to demonstrate
this, I have the following example code:
http://xenbits.xen.org/people/royger/test_poll.c
When executed on Linux:
$ ./test_poll
In callback
On FreeBSD instead, the callback never gets called:
$ ./test_poll
So, in order to workaround this, poll the source with G_IO_HUP (which
makes the code behave the same way on both Linux and FreeBSD).
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Cc: Michael Tokarev <mjt@tls.msk.ru>
Cc: "Andreas Färber" <afaerber@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: xen-devel@lists.xenproject.org
[Add hw/char/cadence_uart.c too. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/char/cadence_uart.c')
| -rw-r--r-- | hw/char/cadence_uart.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c index bf0c853499..dbbc167425 100644 --- a/hw/char/cadence_uart.c +++ b/hw/char/cadence_uart.c @@ -306,7 +306,8 @@ static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond, memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count); if (s->tx_count) { - int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT, cadence_uart_xmit, s); + int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP, + cadence_uart_xmit, s); assert(r); } |