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-rw-r--r--chardev/char-serial.c3
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;
}