[PATCH 1/2] ASoC: SOF: Fix "no reply expected" error during firmware-boot

[Pierre-Louis Bossart]

On 4/2/20 1:49 PM, Hans de Goede wrote:
> At least on Canon Lake each time the SOF firmware is booted,
> the following error is logged in dmesg:
> 
> [   36.711803] sof-audio-pci 0000:00:1f.3: error: no reply expected, received 0x0
> 
> Since the DSP is powered down when not in used this happens everytime
> e.g. a notification plays, polluting dmesg with these false-positive
> errors.

What kernel are you using Hans? I thought this was solved with

8354d9b44530b ("ASoC: SOF: Intel: hda-loader: clear the IPC ack bit 
after FW_PURGE done")

Set DONE bit after the FW_PURGE IPC is polled successfully, to clear the
interrupt and avoid the arrival of the confusing unexpected ipc.
> Add a check to snd_sof_ipc_reply() which makes it return success when
> receiving an unexpected msg_id 0 during fw-boot, fixing these
> false-positive errors being logged.
> 
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> ---
>   sound/soc/sof/ipc.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c
> index 78aa1da7c7a9..7303b3d42f12 100644
> --- a/sound/soc/sof/ipc.c
> +++ b/sound/soc/sof/ipc.c
> @@ -312,6 +312,11 @@ int snd_sof_ipc_reply(struct snd_sof_dev *sdev, u32 msg_id)
>   {
>   	struct snd_sof_ipc_msg *msg = &sdev->ipc->msg;
>   
> +	/* Ignore msg_id 0 being send during fw-boot */
> +	if (msg->ipc_complete && sdev->fw_state == SOF_FW_BOOT_IN_PROGRESS &&
> +	    msg_id == 0)
> +		return 0;
> +
>   	if (msg->ipc_complete) {
>   		dev_err(sdev->dev, "error: no reply expected, received 0x%x",
>   			msg_id);
>