From 5d0be6da7f9080cc9eed1e179015b134568565cd Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 4 Sep 2018 17:58:40 +0200
Subject: [PATCH] staging: bcm2835-audio: Use PCM runtime values instead
Git-commit: 5d0be6da7f9080cc9eed1e179015b134568565cd
Patch-mainline: v4.20-rc1
References: FATE#324827

Some fields in alsa_stream are the values we keep already in PCM
runtime object, hence they are redundant.  Use the standard PCM
runtime values instead of the private copies.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c |   23 ++------------
 drivers/staging/vc04_services/bcm2835-audio/bcm2835.h     |    4 --
 2 files changed, 4 insertions(+), 23 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
@@ -206,22 +206,7 @@ static int snd_bcm2835_playback_close(st
 static int snd_bcm2835_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct bcm2835_alsa_stream *alsa_stream = runtime->private_data;
-	int err;
-
-	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
-	if (err < 0) {
-		audio_error
-			(" pcm_lib_malloc failed to allocated pages for buffers\n");
-		return err;
-	}
-
-	alsa_stream->channels = params_channels(params);
-	alsa_stream->params_rate = params_rate(params);
-	alsa_stream->pcm_format_width = snd_pcm_format_width(params_format(params));
-
-	return err;
+	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 }
 
 /* hw_free callback */
@@ -248,11 +233,11 @@ static int snd_bcm2835_pcm_prepare(struc
 	if (chip->spdif_status & IEC958_AES0_NONAUDIO)
 		channels = 0;
 	else
-		channels = alsa_stream->channels;
+		channels = runtime->channels;
 
 	err = bcm2835_audio_set_params(alsa_stream, channels,
-		alsa_stream->params_rate,
-		alsa_stream->pcm_format_width);
+				       runtime->rate,
+				       snd_pcm_format_width(runtime->format));
 	if (err < 0)
 		audio_error(" error setting hw params\n");
 
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
@@ -121,10 +121,6 @@ struct bcm2835_alsa_stream {
 
 	int draining;
 
-	int channels;
-	int params_rate;
-	int pcm_format_width;
-
 	unsigned int pos;
 	unsigned int buffer_size;
 	unsigned int period_size;