ASoC: Fix passing platform_data to ac97 bus users and fix a leak

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From: Linux Kernel Mailing List
Date: Wednesday, April 7, 2010 - 9:59 am

Gitweb:     http://git.kernel.org/linus/fb48e3c6a4d8888aff61fbf567aadac7d206e973
Commit:     fb48e3c6a4d8888aff61fbf567aadac7d206e973
Parent:     a8462bde78fdb77c8ede61e1af99617905a78ccf
Author:     Graham Gower <graham.gower@gmail.com>
AuthorDate: Thu Mar 25 10:52:12 2010 +1030
Committer:  Mark Brown <broonie@opensource.wolfsonmicro.com>
CommitDate: Mon Mar 29 21:00:37 2010 +0100

    ASoC: Fix passing platform_data to ac97 bus users and fix a leak
    
    [The issue is an attempt to write the pdata without the AC97 device
    allocated when using ac97.c - also added a comment in soc-core.c for the
    special case for ac97. -- broonie]
    
    Signed-off-by: Graham Gower <graham.gower@gmail.com>
    Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
    Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/ac97.c |   15 +++++++++------
 sound/soc/soc-core.c    |    3 ++-
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c
index a1bbe16..bcfa532 100644
--- a/sound/soc/codecs/ac97.c
+++ b/sound/soc/codecs/ac97.c
@@ -80,9 +80,11 @@ static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
 static int ac97_soc_probe(struct platform_device *pdev)
 {
 	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_card *card = socdev->card;
 	struct snd_soc_codec *codec;
 	struct snd_ac97_bus *ac97_bus;
 	struct snd_ac97_template ac97_template;
+	int i;
 	int ret = 0;
 
 	printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION);
@@ -102,12 +104,6 @@ static int ac97_soc_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&codec->dapm_widgets);
 	INIT_LIST_HEAD(&codec->dapm_paths);
 
-	ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
-	if (ret < 0) {
-		printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n");
-		goto err;
-	}
-
 	/* register pcms */
 	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 	if (ret < 0)
@@ -123,6 +119,13 @@ static int ac97_soc_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto bus_err;
 
+	for (i = 0; i < card->num_links; i++) {
+		if (card->dai_link[i].codec_dai->ac97_control) {
+			snd_ac97_dev_add_pdata(codec->ac97,
+				card->dai_link[i].cpu_dai->ac97_pdata);
+		}
+	}
+
 	return 0;
 
 bus_err:
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index c8b0556..d0efd5e 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1548,7 +1548,8 @@ int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
 			mutex_unlock(&codec->mutex);
 			return ret;
 		}
-		if (card->dai_link[i].codec_dai->ac97_control) {
+		/* Check for codec->ac97 to handle the ac97.c fun */
+		if (card->dai_link[i].codec_dai->ac97_control && codec->ac97) {
 			snd_ac97_dev_add_pdata(codec->ac97,
 				card->dai_link[i].cpu_dai->ac97_pdata);
 		}
--
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