[PATCH 55/69] ASoC: rt5645: add error checking to rt5645_probe function

Greg Kroah-Hartman
2021-05-03T12:01:53Z

From: Phillip Potter <phil@philpotter.co.uk>

Check for return value from various snd_soc_dapm_* calls, as many of
them can return errors and this should be handled. Also, reintroduce
the allocation failure check for rt5645->eq_param as well. Make all
areas where return values are checked lead to the end of the function
in the case of an error. Finally, introduce a comment explaining how
resources here are actually eventually cleaned up by the caller.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/soc/codecs/rt5645.c | 48 +++++++++++++++++++++++++++++++--------
1 file changed, 39 insertions(+), 9 deletions(-)

diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 7cb90975009a..438fa18bcb55 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3388,30 +3388,44 @@ static int rt5645_probe(struct snd_soc_component *component)
{
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
struct rt5645_priv *rt5645 = snd_soc_component_get_drvdata(component);
+ int ret = 0;

rt5645->component = component;

switch (rt5645->codec_type) {
case CODEC_TYPE_RT5645:
- snd_soc_dapm_new_controls(dapm,
+ ret = snd_soc_dapm_new_controls(dapm,
rt5645_specific_dapm_widgets,
ARRAY_SIZE(rt5645_specific_dapm_widgets));
- snd_soc_dapm_add_routes(dapm,
+ if (ret < 0)
+ goto exit;
+
+ ret = snd_soc_dapm_add_routes(dapm,
rt5645_specific_dapm_routes,
ARRAY_SIZE(rt5645_specific_dapm_routes));
+ if (ret < 0)
+ goto exit;
+
if (rt5645->v_id < 3) {
- snd_soc_dapm_add_routes(dapm,
+ ret = snd_soc_dapm_add_routes(dapm,
rt5645_old_dapm_routes,
ARRAY_SIZE(rt5645_old_dapm_routes));
+ if (ret < 0)
+ goto exit;
}
break;
case CODEC_TYPE_RT5650:
- snd_soc_dapm_new_controls(dapm,
+ ret = snd_soc_dapm_new_controls(dapm,
rt5650_specific_dapm_widgets,
ARRAY_SIZE(rt5650_specific_dapm_widgets));
- snd_soc_dapm_add_routes(dapm,
+ if (ret < 0)
+ goto exit;
+
+ ret = snd_soc_dapm_add_routes(dapm,
rt5650_specific_dapm_routes,
ARRAY_SIZE(rt5650_specific_dapm_routes));
+ if (ret < 0)
+ goto exit;
break;
}

@@ -3419,9 +3433,17 @@ static int rt5645_probe(struct snd_soc_component *component)

/* for JD function */
if (rt5645->pdata.jd_mode) {
- snd_soc_dapm_force_enable_pin(dapm, "JD Power");
- snd_soc_dapm_force_enable_pin(dapm, "LDO2");
- snd_soc_dapm_sync(dapm);
+ ret = snd_soc_dapm_force_enable_pin(dapm, "JD Power");
+ if (ret < 0)
+ goto exit;
+
+ ret = snd_soc_dapm_force_enable_pin(dapm, "LDO2");
+ if (ret < 0)
+ goto exit;
+
+ ret = snd_soc_dapm_sync(dapm);
+ if (ret < 0)
+ goto exit;
}

if (rt5645->pdata.long_name)
@@ -3431,7 +3453,15 @@ static int rt5645_probe(struct snd_soc_component *component)
RT5645_HWEQ_NUM, sizeof(struct rt5645_eq_param_s),
GFP_KERNEL);

- return 0;
+ if (!rt5645->eq_param)
+ ret = -ENOMEM;
+exit:
+ /*
+ * If there was an error above, everything will be cleaned up by the
+ * caller if we return an error here. This will be done with a later
+ * call to rt5645_remove().
+ */
+ return ret;
}

static void rt5645_remove(struct snd_soc_component *component)
--
2.31.1