When a port is hot-unplugged while an app is blocked on poll(), unblock
the poll() and return.
Signed-off-by: Amit Shah <amit.shah@xxxxxxxxxx>
---
drivers/char/virtio_console.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 488d250..c8a5678 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -648,6 +648,10 @@ static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
port = filp->private_data;
poll_wait(filp, &port->waitqueue, wait);
+ if (!port->guest_connected) {
+ /* Port got unplugged */
+ return POLLHUP;
+ }
ret = 0;
if (port->inbuf)
ret |= POLLIN | POLLRDNORM;
--
1.7.2.2
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