From 1c64fdbc8177058802df205f5d7cd65edafa59a8 Mon Sep 17 00:00:00 2001 From: Ed Swierk Date: Tue, 31 Jan 2017 05:45:29 -0800 Subject: [PATCH] char: drop data written to a disconnected pty When a serial port writes data to a pty that's disconnected, drop the data and return the length dropped. This avoids triggering pointless retries in callers like the 16550A serial_xmit(), and causes qemu_chr_fe_write() to write all data to the log file, rather than logging only while a pty client like virsh console happens to be connected. Signed-off-by: Ed Swierk Message-Id: <1485870329-79428-1-git-send-email-eswierk@skyportsystems.com> Signed-off-by: Paolo Bonzini --- chardev/char-pty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chardev/char-pty.c b/chardev/char-pty.c index 27eb85f505..ecf2c7a5c4 100644 --- a/chardev/char-pty.c +++ b/chardev/char-pty.c @@ -129,7 +129,7 @@ static int char_pty_chr_write(Chardev *chr, const uint8_t *buf, int len) /* guest sends data, check for (re-)connect */ pty_chr_update_read_handler_locked(chr); if (!s->connected) { - return 0; + return len; } } return io_channel_send(s->ioc, buf, len);