diff options
Diffstat (limited to 'include/hw/audio/virtio-snd.h')
| -rw-r--r-- | include/hw/audio/virtio-snd.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/hw/audio/virtio-snd.h b/include/hw/audio/virtio-snd.h index 3d79181364..8dafedb276 100644 --- a/include/hw/audio/virtio-snd.h +++ b/include/hw/audio/virtio-snd.h @@ -151,7 +151,6 @@ struct VirtIOSoundPCMStream { QemuMutex queue_mutex; bool active; QSIMPLEQ_HEAD(, VirtIOSoundPCMBuffer) queue; - QSIMPLEQ_HEAD(, VirtIOSoundPCMBuffer) invalid; }; /* @@ -223,6 +222,21 @@ struct VirtIOSound { QemuMutex cmdq_mutex; QTAILQ_HEAD(, virtio_snd_ctrl_command) cmdq; bool processing_cmdq; + /* + * Convenience queue to keep track of invalid tx/rx queue messages inside + * the tx/rx callbacks. + * + * In the callbacks as a first step we are emptying the virtqueue to handle + * each message and we cannot add an invalid message back to the queue: we + * would re-process it in subsequent loop iterations. + * + * Instead, we add them to this queue and after finishing examining every + * virtqueue element, we inform the guest for each invalid message. + * + * This queue must be empty at all times except for inside the tx/rx + * callbacks. + */ + QSIMPLEQ_HEAD(, VirtIOSoundPCMBuffer) invalid; }; struct virtio_snd_ctrl_command { |