From: Peter Ujfalusi peter.ujfalusi@linux.intel.com
Instead of using a local reply to first read out the header from the mailbox then memcpy it or read it again to msg->reply_data, read it directly to it's final place from the start.
If we received an error we do not need to do a memcpy anymore. If the reply is reporting a success then we don not need to read the reply again from the mailbox if the reply_size equals to the already read header size.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@nxp.com Reviewed-by: Bard Liao yung-chuan.liao@linux.intel.com Signed-off-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com --- sound/soc/sof/ipc.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index c722ca0b00a6..46c40dfd9f2b 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -393,7 +393,7 @@ EXPORT_SYMBOL(sof_ipc_tx_message_no_pm); void snd_sof_ipc_get_reply(struct snd_sof_dev *sdev) { struct snd_sof_ipc_msg *msg = sdev->msg; - struct sof_ipc_reply reply; + struct sof_ipc_reply *reply; int ret = 0;
/* @@ -407,13 +407,12 @@ void snd_sof_ipc_get_reply(struct snd_sof_dev *sdev) }
/* get the generic reply */ - snd_sof_dsp_mailbox_read(sdev, sdev->host_box.offset, &reply, - sizeof(reply)); + reply = msg->reply_data; + snd_sof_dsp_mailbox_read(sdev, sdev->host_box.offset, reply, sizeof(*reply));
- if (reply.error < 0) { - memcpy(msg->reply_data, &reply, sizeof(reply)); - ret = reply.error; - } else if (!reply.hdr.size) { + if (reply->error < 0) { + ret = reply->error; + } else if (!reply->hdr.size) { /* Reply should always be >= sizeof(struct sof_ipc_reply) */ if (msg->reply_size) dev_err(sdev->dev, @@ -424,24 +423,27 @@ void snd_sof_ipc_get_reply(struct snd_sof_dev *sdev)
ret = -EINVAL; } else if (msg->reply_size > 0) { - if (reply.hdr.size == msg->reply_size) { + if (reply->hdr.size == msg->reply_size) { ret = 0; - } else if (reply.hdr.size < msg->reply_size) { + } else if (reply->hdr.size < msg->reply_size) { dev_dbg(sdev->dev, "reply size (%u) is less than expected (%zu)\n", - reply.hdr.size, msg->reply_size); + reply->hdr.size, msg->reply_size);
- msg->reply_size = reply.hdr.size; + msg->reply_size = reply->hdr.size; ret = 0; } else { dev_err(sdev->dev, "reply size (%u) exceeds the buffer size (%zu)\n", - reply.hdr.size, msg->reply_size); + reply->hdr.size, msg->reply_size); ret = -EINVAL; }
- /* get the full message if reply.hdr.size <= msg->reply_size */ - if (!ret) + /* + * get the full message if reply->hdr.size <= msg->reply_size + * and the reply->hdr.size > sizeof(struct sof_ipc_reply) + */ + if (!ret && msg->reply_size > sizeof(*reply)) snd_sof_dsp_mailbox_read(sdev, sdev->host_box.offset, msg->reply_data, msg->reply_size); }