[alsa-devel] [PATCH] ALSA: x86: hdmi: fix returnvar.cocci warnings

[Takashi Iwai]

On Tue, 24 Jan 2017 17:07:48 +0100,
Julia Lawall wrote:
> 
> Remove unneeded variable used to store return value.
> 
> Generated by: scripts/coccinelle/misc/returnvar.cocci
> 
> CC: Jerome Anand <jerome.anand at intel.com>
> Signed-off-by: Julia Lawall <julia.lawall at lip6.fr>
> Signed-off-by: Fengguang Wu <fengguang.wu at intel.com>
> ---
> 
> In-Reply-To: <20170124225753.9045-5-jerome.anand at intel.com>
> url:
> https://github.com/0day-ci/linux/commits/Jerome-Anand/Add-support-for-Legacy
> -HDMI-audio-drivers/20170124-213547
> 
> This is probably not the right patch.  It si just what the rule generates.
> Instead, I guess that retval should be updated in some way?

Yeah, it looks a bit suspicious, but it can be fixed later.
So I applied your cleanup now.


thanks,

Takashi

> 
>  intel_hdmi_audio_if.c |   21 +++++++++------------
>  1 file changed, 9 insertions(+), 12 deletions(-)
> 
> --- a/sound/x86/intel_hdmi_audio_if.c
> +++ b/sound/x86/intel_hdmi_audio_if.c
> @@ -239,7 +239,6 @@ static inline int had_chk_intrmiss(struc
> 
>  int had_process_buffer_done(struct snd_intelhad *intelhaddata)
>  {
> -	int retval = 0;
>  	u32 len = 1;
>  	enum intel_had_aud_buf_type buf_id;
>  	enum intel_had_aud_buf_type buff_done;
> @@ -258,7 +257,7 @@ int had_process_buffer_done(struct snd_i
>  	if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED) {
>  		spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
>  		pr_err("%s:Device already disconnected\n", __func__);
> -		return retval;
> +		return 0;
>  	}
>  	buf_id = intelhaddata->curr_buf;
>  	intelhaddata->buff_done = buf_id;
> @@ -280,7 +279,7 @@ int had_process_buffer_done(struct snd_i
>  		if (!intr_count || (intr_count > 3)) {
>  			pr_err("HAD SW state in non-recoverable!!! mode\n");
>  			pr_err("Already played stale data\n");
> -			return retval;
> +			return 0;
>  		}
>  		buf_id += (intr_count - 1);
>  		buf_id = buf_id % 4;
> @@ -298,7 +297,7 @@ int had_process_buffer_done(struct snd_i
> 
>  	if (had_get_hwstate(intelhaddata)) {
>  		pr_err("HDMI cable plugged-out\n");
> -		return retval;
> +		return 0;
>  	}
> 
>  	/*Reprogram the registers with addr and length*/
> @@ -322,12 +321,11 @@ int had_process_buffer_done(struct snd_i
>  		stream->period_elapsed(stream->had_substream);
>  	}
> 
> -	return retval;
> +	return 0;
>  }
> 
>  int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
>  {
> -	int retval = 0;
>  	enum intel_had_aud_buf_type buf_id;
>  	struct pcm_stream_info *stream;
>  	struct had_pvt_data *had_stream;
> @@ -355,7 +353,7 @@ int had_process_buffer_underrun(struct s
> 
>  	if (drv_status == HAD_DRV_DISCONNECTED) {
>  		pr_err("%s:Device already disconnected\n", __func__);
> -		return retval;
> +		return 0;
>  	}
> 
>  	if (stream_type == HAD_RUNNING_STREAM) {
> @@ -364,12 +362,11 @@ int had_process_buffer_underrun(struct s
>  		stream->period_elapsed(stream->had_substream);
>  	}
> 
> -	return retval;
> +	return 0;
>  }
> 
>  int had_process_hot_plug(struct snd_intelhad *intelhaddata)
>  {
> -	int retval = 0;
>  	enum intel_had_aud_buf_type buf_id;
>  	struct snd_pcm_substream *substream;
>  	struct had_pvt_data *had_stream;
> @@ -384,7 +381,7 @@ int had_process_hot_plug(struct snd_inte
>  	if (intelhaddata->drv_status == HAD_DRV_CONNECTED) {
>  		pr_debug("Device already connected\n");
>  		spin_unlock_irqrestore(&intelhaddata->had_spinlock, flag_irqs);
> -		return retval;
> +		return 0;
>  	}
>  	buf_id = intelhaddata->curr_buf;
>  	intelhaddata->buff_done = buf_id;
> @@ -422,12 +419,12 @@ int had_process_hot_plug(struct snd_inte
> 
>  	had_build_channel_allocation_map(intelhaddata);
> 
> -	return retval;
> +	return 0;
> 
>  err:
>  	pm_runtime_disable(intelhaddata->dev);
>  	intelhaddata->dev = NULL;
> -	return retval;
> +	return 0;
>  }
> 
>  int had_process_hot_unplug(struct snd_intelhad *intelhaddata)
>