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virtio: console: add locks around buffer removal in port unplug path
[cascardo/linux.git]
/
drivers
/
char
/
virtio_console.c
diff --git
a/drivers/char/virtio_console.c
b/drivers/char/virtio_console.c
index
1b456fe
..
601962b
100644
(file)
--- a/
drivers/char/virtio_console.c
+++ b/
drivers/char/virtio_console.c
@@
-1513,18
+1513,22
@@
static void remove_port_data(struct port *port)
{
struct port_buffer *buf;
{
struct port_buffer *buf;
+ spin_lock_irq(&port->inbuf_lock);
/* Remove unused data this port might have received. */
discard_port_data(port);
/* Remove unused data this port might have received. */
discard_port_data(port);
- reclaim_consumed_buffers(port);
-
/* Remove buffers we queued up for the Host to send us data in. */
while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
free_buf(buf, true);
/* Remove buffers we queued up for the Host to send us data in. */
while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
free_buf(buf, true);
+ spin_unlock_irq(&port->inbuf_lock);
+
+ spin_lock_irq(&port->outvq_lock);
+ reclaim_consumed_buffers(port);
/* Free pending buffers from the out-queue. */
while ((buf = virtqueue_detach_unused_buf(port->out_vq)))
free_buf(buf, true);
/* Free pending buffers from the out-queue. */
while ((buf = virtqueue_detach_unused_buf(port->out_vq)))
free_buf(buf, true);
+ spin_unlock_irq(&port->outvq_lock);
}
/*
}
/*