Failing to register the debugfs entries is not fatal and will not affect normal operation of the sound card. Don't abort the card registration if soc_dpcm_debugfs_add() fails.

Signed-off-by: Lars-Peter Clausen lars@metafoo.de --- include/sound/soc-dpcm.h | 2 +- sound/soc/soc-core.c | 11 ++--------- sound/soc/soc-pcm.c | 8 +++----- 3 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/include/sound/soc-dpcm.h b/include/sound/soc-dpcm.h index 98f2ade..8060590 100644 --- a/include/sound/soc-dpcm.h +++ b/include/sound/soc-dpcm.h @@ -135,7 +135,7 @@ void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,

/* internal use only */ int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute); -int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); +void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd); int soc_dpcm_runtime_update(struct snd_soc_card *);

int dpcm_path_get(struct snd_soc_pcm_runtime *fe, diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 7bd1599..e97b395 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1324,15 +1324,8 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)

#ifdef CONFIG_DEBUG_FS /* add DPCM sysfs entries */ - if (dai_link->dynamic) { - ret = soc_dpcm_debugfs_add(rtd); - if (ret < 0) { - dev_err(rtd->dev, - "ASoC: failed to add dpcm sysfs entries: %d\n", - ret); - return ret; - } - } + if (dai_link->dynamic) + soc_dpcm_debugfs_add(rtd); #endif

if (cpu_dai->driver->compress_dai) { diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 6e3781e..e67378a 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -2803,10 +2803,10 @@ static const struct file_operations dpcm_state_fops = { .llseek = default_llseek, };

-int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) +void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) { if (!rtd->dai_link) - return 0; + return;

rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, rtd->card->debugfs_card_root); @@ -2814,13 +2814,11 @@ int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) dev_dbg(rtd->dev, "ASoC: Failed to create dpcm debugfs directory %s\n", rtd->dai_link->name); - return -EINVAL; + return; }

rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root, rtd, &dpcm_state_fops); - - return 0; } #endif

If the registration of a debugfs directory fails this is treated as a non-fatal error in ASoC and operation continues as normal. This means we need to be careful and check if the parent debugfs directory exists if we try to register a debugfs file or sub-directory. Otherwise we might end up passing NULL for the parent and the file or directory will be registered in the top-level debugfs directory.

Signed-off-by: Lars-Peter Clausen lars@metafoo.de --- sound/soc/soc-core.c | 66 +++++++++++++++++++++++++++++++++++----------------- sound/soc/soc-dapm.c | 3 +++ sound/soc/soc-pcm.c | 8 +++++-- 3 files changed, 54 insertions(+), 23 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index e97b395..32ebe5b 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -292,6 +292,9 @@ static const struct file_operations codec_reg_fops = {

static void soc_init_component_debugfs(struct snd_soc_component *component) { + if (!component->card->debugfs_card_root) + return; + if (component->debugfs_prefix) { char *name;

@@ -455,6 +458,9 @@ static const struct file_operations platform_list_fops = {

static void soc_init_card_debugfs(struct snd_soc_card *card) { + if (!snd_soc_debugfs_root) + return; + card->debugfs_card_root = debugfs_create_dir(card->name, snd_soc_debugfs_root); if (!card->debugfs_card_root) { @@ -476,6 +482,34 @@ static void soc_cleanup_card_debugfs(struct snd_soc_card *card) debugfs_remove_recursive(card->debugfs_card_root); }

+ +static void snd_soc_debugfs_init(void) +{ + snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); + if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { + pr_warn("ASoC: Failed to create debugfs directory\n"); + snd_soc_debugfs_root = NULL; + return; + } + + if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, + &codec_list_fops)) + pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); + + if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, + &dai_list_fops)) + pr_warn("ASoC: Failed to create DAI list debugfs file\n"); + + if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, + &platform_list_fops)) + pr_warn("ASoC: Failed to create platform list debugfs file\n"); +} + +static void snd_soc_debugfs_exit(void) +{ + debugfs_remove_recursive(snd_soc_debugfs_root); +} + #else

#define soc_init_codec_debugfs NULL @@ -497,6 +531,15 @@ static inline void soc_init_card_debugfs(struct snd_soc_card *card) static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { } + +static inline void snd_soc_debugfs_init(void) +{ +} + +static inline void snd_soc_debugfs_exit(void) +{ +} + #endif

struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card, @@ -3584,26 +3627,7 @@ EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);

static int __init snd_soc_init(void) { -#ifdef CONFIG_DEBUG_FS - snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL); - if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) { - pr_warn("ASoC: Failed to create debugfs directory\n"); - snd_soc_debugfs_root = NULL; - } - - if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL, - &codec_list_fops)) - pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); - - if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL, - &dai_list_fops)) - pr_warn("ASoC: Failed to create DAI list debugfs file\n"); - - if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL, - &platform_list_fops)) - pr_warn("ASoC: Failed to create platform list debugfs file\n"); -#endif - + snd_soc_debugfs_init(); snd_soc_util_init();

return platform_driver_register(&soc_driver); @@ -3613,9 +3637,9 @@ module_init(snd_soc_init); static void __exit snd_soc_exit(void) { snd_soc_util_exit(); + snd_soc_debugfs_exit();

#ifdef CONFIG_DEBUG_FS - debugfs_remove_recursive(snd_soc_debugfs_root); #endif platform_driver_unregister(&soc_driver); } diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 4bd2a6f..defe0f0 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1918,6 +1918,9 @@ void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, { struct dentry *d;

+ if (!parent) + return; + dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);

if (!dapm->debugfs_dapm) { diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index e67378a..35fe58f4 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1097,8 +1097,9 @@ static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, stream ? "<-" : "->", be->dai_link->name);

#ifdef CONFIG_DEBUG_FS - dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, - fe->debugfs_dpcm_root, &dpcm->state); + if (fe->debugfs_dpcm_root) + dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, + fe->debugfs_dpcm_root, &dpcm->state); #endif return 1; } @@ -2808,6 +2809,9 @@ void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) if (!rtd->dai_link) return;

+ if (!rtd->card->debugfs_card_root) + return; + rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, rtd->card->debugfs_card_root); if (!rtd->debugfs_dpcm_root) {