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/soc/soc-pcm.c | |
| parent | 2e55b90a5e234524f8195c657006ec4f71103dff (diff) | |
| download | lwn-6553bf06a369683408895b87e5172aa99a9266bd.tar.gz lwn-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/soc/soc-pcm.c')
| -rw-r--r-- | sound/soc/soc-pcm.c | 8 |
1 files changed, 6 insertions, 2 deletions
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) { |