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ASoC: topology: Perform component check upfront

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Function soc_tplg_dbytes_create(), calls soc_tplg_init_kcontrol() to
perform additional driver specific initialization. While
soc_tplg_init_kcontrol() ensures that component is valid before invoking
ops->control_load, there is no such check at the end of
soc_tplg_dbytes_create() where list_add() is used.

Also in quite a few places, there is reference of tplg->comp->dapm or
tplg->comp->card, without any checks for tplg->comp.

In consequence of the above this may lead to referencing NULL pointer.

This allows for removal of now unnecessary checks.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20200312122239.14489-1-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Amadeusz Sławiński 2020-03-12 08:22:39 -04:00 committed by Mark Brown
parent 6187509ba5
commit c42464a4e6
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 13 additions and 9 deletions
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22
sound/soc/soc-topology.c
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@ -251,7 +251,7 @@ static int soc_tplg_vendor_load_(struct soc_tplg *tplg,
{
int ret = 0;
if (tplg->comp && tplg->ops && tplg->ops->vendor_load)
if (tplg->ops && tplg->ops->vendor_load)
ret = tplg->ops->vendor_load(tplg->comp, tplg->index, hdr);
else {
dev_err(tplg->dev, "ASoC: no vendor load callback for ID %d\n",
@ -283,7 +283,7 @@ static int soc_tplg_vendor_load(struct soc_tplg *tplg,
static int soc_tplg_widget_load(struct soc_tplg *tplg,
struct snd_soc_dapm_widget *w, struct snd_soc_tplg_dapm_widget *tplg_w)
{
if (tplg->comp && tplg->ops && tplg->ops->widget_load)
if (tplg->ops && tplg->ops->widget_load)
return tplg->ops->widget_load(tplg->comp, tplg->index, w,
tplg_w);
@ -295,7 +295,7 @@ static int soc_tplg_widget_load(struct soc_tplg *tplg,
static int soc_tplg_widget_ready(struct soc_tplg *tplg,
struct snd_soc_dapm_widget *w, struct snd_soc_tplg_dapm_widget *tplg_w)
{
if (tplg->comp && tplg->ops && tplg->ops->widget_ready)
if (tplg->ops && tplg->ops->widget_ready)
return tplg->ops->widget_ready(tplg->comp, tplg->index, w,
tplg_w);
@ -307,7 +307,7 @@ static int soc_tplg_dai_load(struct soc_tplg *tplg,
struct snd_soc_dai_driver *dai_drv,
struct snd_soc_tplg_pcm *pcm, struct snd_soc_dai *dai)
{
if (tplg->comp && tplg->ops && tplg->ops->dai_load)
if (tplg->ops && tplg->ops->dai_load)
return tplg->ops->dai_load(tplg->comp, tplg->index, dai_drv,
pcm, dai);
@ -318,7 +318,7 @@ static int soc_tplg_dai_load(struct soc_tplg *tplg,
static int soc_tplg_dai_link_load(struct soc_tplg *tplg,
struct snd_soc_dai_link *link, struct snd_soc_tplg_link_config *cfg)
{
if (tplg->comp && tplg->ops && tplg->ops->link_load)
if (tplg->ops && tplg->ops->link_load)
return tplg->ops->link_load(tplg->comp, tplg->index, link, cfg);
return 0;
@ -327,7 +327,7 @@ static int soc_tplg_dai_link_load(struct soc_tplg *tplg,
/* tell the component driver that all firmware has been loaded in this request */
static void soc_tplg_complete(struct soc_tplg *tplg)
{
if (tplg->comp && tplg->ops && tplg->ops->complete)
if (tplg->ops && tplg->ops->complete)
tplg->ops->complete(tplg->comp);
}
@ -684,7 +684,7 @@ EXPORT_SYMBOL_GPL(snd_soc_tplg_widget_bind_event);
static int soc_tplg_init_kcontrol(struct soc_tplg *tplg,
struct snd_kcontrol_new *k, struct snd_soc_tplg_ctl_hdr *hdr)
{
if (tplg->comp && tplg->ops && tplg->ops->control_load)
if (tplg->ops && tplg->ops->control_load)
return tplg->ops->control_load(tplg->comp, tplg->index, k,
hdr);
@ -1174,7 +1174,7 @@ static int soc_tplg_kcontrol_elems_load(struct soc_tplg *tplg,
static int soc_tplg_add_route(struct soc_tplg *tplg,
struct snd_soc_dapm_route *route)
{
if (tplg->comp && tplg->ops && tplg->ops->dapm_route_load)
if (tplg->ops && tplg->ops->dapm_route_load)
return tplg->ops->dapm_route_load(tplg->comp, tplg->index,
route);
@ -2563,7 +2563,7 @@ static int soc_tplg_manifest_load(struct soc_tplg *tplg,
}
/* pass control to component driver for optional further init */
if (tplg->comp && tplg->ops && tplg->ops->manifest)
if (tplg->ops && tplg->ops->manifest)
ret = tplg->ops->manifest(tplg->comp, tplg->index, _manifest);
if (!abi_match) /* free the duplicated one */
@ -2735,6 +2735,10 @@ int snd_soc_tplg_component_load(struct snd_soc_component *comp,
struct soc_tplg tplg;
int ret;
/* component needs to exist to keep and reference data while parsing */
if (!comp)
return -EINVAL;
/* setup parsing context */
memset(&tplg, 0, sizeof(tplg));
tplg.fw = fw;