diff options
| author | Jie Yang <yang.jie@intel.com> | 2015-05-30 22:33:58 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-06-02 15:34:11 +0100 |
| commit | 2dbc80caf7e93c3d49787cf939fc416873125c1b (patch) | |
| tree | 96415a9dad4b9266e7bd61e7b778dc79e51fc56e /sound/soc/intel/haswell | |
| parent | 6e5132f79a2e441bde4818abdc813859c8064901 (diff) | |
| download | linux-2dbc80caf7e93c3d49787cf939fc416873125c1b.tar.bz2 | |
ASoC: Intel: check and clear runtime module pointer
Add check runtime module pointers before freeing them, and clear
them to NULL after freed.
With this implemented, we can avoid NULL pointer dereference or
double free errors.
Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel/haswell')
| -rw-r--r-- | sound/soc/intel/haswell/sst-haswell-pcm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/soc/intel/haswell/sst-haswell-pcm.c b/sound/soc/intel/haswell/sst-haswell-pcm.c index 23ae0400d6db..f97fa5ab93d3 100644 --- a/sound/soc/intel/haswell/sst-haswell-pcm.c +++ b/sound/soc/intel/haswell/sst-haswell-pcm.c @@ -928,10 +928,15 @@ static void hsw_pcm_free_modules(struct hsw_priv_data *pdata) for (i = 0; i < ARRAY_SIZE(mod_map); i++) { pcm_data = &pdata->pcm[mod_map[i].dai_id][mod_map[i].stream]; - sst_hsw_runtime_module_free(pcm_data->runtime); + if (pcm_data->runtime){ + sst_hsw_runtime_module_free(pcm_data->runtime); + pcm_data->runtime = NULL; + } } - if (sst_hsw_is_module_loaded(hsw, SST_HSW_MODULE_WAVES)) { + if (sst_hsw_is_module_loaded(hsw, SST_HSW_MODULE_WAVES) && + pdata->runtime_waves) { sst_hsw_runtime_module_free(pdata->runtime_waves); + pdata->runtime_waves = NULL; } } |