diff options
author | Lars-Peter Clausen <lars@metafoo.de> | 2015-04-09 10:52:38 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2015-04-09 12:23:14 +0100 |
commit | 6553bf06a369683408895b87e5172aa99a9266bd (patch) | |
tree | 39ddb89fa018f224eb46b67894f0ff13ae986ac5 /sound | |
parent | 2e55b90a5e234524f8195c657006ec4f71103dff (diff) | |
download | linux-stable-6553bf06a369683408895b87e5172aa99a9266bd.tar.gz linux-stable-6553bf06a369683408895b87e5172aa99a9266bd.tar.bz2 linux-stable-6553bf06a369683408895b87e5172aa99a9266bd.zip |
ASoC: Don't try to register debugfs entries if the parent does not exist
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>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r-- | sound/soc/soc-core.c | 66 | ||||
-rw-r--r-- | sound/soc/soc-dapm.c | 3 | ||||
-rw-r--r-- | 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 d29c68ad83c7..9dfa2e241865 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, @@ -3580,26 +3623,7 @@ 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); @@ -3609,9 +3633,9 @@ 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 b6f88202b8c9..1fd2d458824e 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1898,6 +1898,9 @@ 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 9c514fde7154..b0d61e6531e6 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; } @@ -2807,6 +2808,9 @@ 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) { |