ASoC: topology: Consolidate and fix asoc_tplg_dapm_widget_*_create flow

There are a few soc_tplg_dapm_widget_*_create functions with similar
content, but slightly different flow, unify their flow and make sure
that we go to error handler and free memory in case of failure.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Acked-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index a926c2a..fc1f1d6 100644 (file)
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1310,14 +1310,15 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
 
        for (i = 0; i < num_kcontrols; i++) {
                mc = (struct snd_soc_tplg_mixer_control *)tplg->pos;
-               sm = kzalloc(sizeof(*sm), GFP_KERNEL);
-               if (sm == NULL)
-                       goto err;
 
                /* validate kcontrol */
                if (strnlen(mc->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
                        SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-                       goto err_str;
+                       goto err_sm;
+
+               sm = kzalloc(sizeof(*sm), GFP_KERNEL);
+               if (sm == NULL)
+                       goto err_sm;
 
                tplg->pos += (sizeof(struct snd_soc_tplg_mixer_control) +
                              le32_to_cpu(mc->priv.size));
@@ -1327,7 +1328,7 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
 
                kc[i].name = kstrdup(mc->hdr.name, GFP_KERNEL);
                if (kc[i].name == NULL)
-                       goto err_str;
+                       goto err_sm;
                kc[i].private_value = (long)sm;
                kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
                kc[i].access = mc->hdr.access;
@@ -1353,8 +1354,7 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
                err = soc_tplg_kcontrol_bind_io(&mc->hdr, &kc[i], tplg);
                if (err) {
                        soc_control_err(tplg, &mc->hdr, mc->hdr.name);
-                       kfree(sm);
-                       continue;
+                       goto err_sm;
                }
 
                /* create any TLV data */
@@ -1367,20 +1367,19 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
                        dev_err(tplg->dev, "ASoC: failed to init %s\n",
                                mc->hdr.name);
                        soc_tplg_free_tlv(tplg, &kc[i]);
-                       kfree(sm);
-                       continue;
+                       goto err_sm;
                }
        }
        return kc;
 
-err_str:
-       kfree(sm);
-err:
-       for (--i; i >= 0; i--) {
-               kfree((void *)kc[i].private_value);
+err_sm:
+       for (; i >= 0; i--) {
+               sm = (struct soc_mixer_control *)kc[i].private_value;
+               kfree(sm);
                kfree(kc[i].name);
        }
        kfree(kc);
+
        return NULL;
 }
 
@@ -1401,11 +1400,11 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
                /* validate kcontrol */
                if (strnlen(ec->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
                            SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-                       goto err;
+                       goto err_se;
 
                se = kzalloc(sizeof(*se), GFP_KERNEL);
                if (se == NULL)
-                       goto err;
+                       goto err_se;
 
                tplg->pos += (sizeof(struct snd_soc_tplg_enum_control) +
                                ec->priv.size);
@@ -1414,10 +1413,8 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
                        ec->hdr.name);
 
                kc[i].name = kstrdup(ec->hdr.name, GFP_KERNEL);
-               if (kc[i].name == NULL) {
-                       kfree(se);
+               if (kc[i].name == NULL)
                        goto err_se;
-               }
                kc[i].private_value = (long)se;
                kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
                kc[i].access = ec->hdr.access;
@@ -1482,44 +1479,43 @@ err_se:
        for (; i >= 0; i--) {
                /* free values and texts */
                se = (struct soc_enum *)kc[i].private_value;
-               if (!se)
-                       continue;
 
-               soc_tplg_denum_remove_values(se);
-               soc_tplg_denum_remove_texts(se);
+               if (se) {
+                       soc_tplg_denum_remove_values(se);
+                       soc_tplg_denum_remove_texts(se);
+               }
 
                kfree(se);
                kfree(kc[i].name);
        }
-err:
        kfree(kc);
 
        return NULL;
 }
 
 static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
-       struct soc_tplg *tplg, int count)
+       struct soc_tplg *tplg, int num_kcontrols)
 {
        struct snd_soc_tplg_bytes_control *be;
-       struct soc_bytes_ext  *sbe;
+       struct soc_bytes_ext *sbe;
        struct snd_kcontrol_new *kc;
        int i, err;
 
-       kc = kcalloc(count, sizeof(*kc), GFP_KERNEL);
+       kc = kcalloc(num_kcontrols, sizeof(*kc), GFP_KERNEL);
        if (!kc)
                return NULL;
 
-       for (i = 0; i < count; i++) {
+       for (i = 0; i < num_kcontrols; i++) {
                be = (struct snd_soc_tplg_bytes_control *)tplg->pos;
 
                /* validate kcontrol */
                if (strnlen(be->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
                        SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
-                       goto err;
+                       goto err_sbe;
 
                sbe = kzalloc(sizeof(*sbe), GFP_KERNEL);
                if (sbe == NULL)
-                       goto err;
+                       goto err_sbe;
 
                tplg->pos += (sizeof(struct snd_soc_tplg_bytes_control) +
                              le32_to_cpu(be->priv.size));
@@ -1529,10 +1525,8 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
                        be->hdr.name, be->hdr.access);
 
                kc[i].name = kstrdup(be->hdr.name, GFP_KERNEL);
-               if (kc[i].name == NULL) {
-                       kfree(sbe);
-                       goto err;
-               }
+               if (kc[i].name == NULL)
+                       goto err_sbe;
                kc[i].private_value = (long)sbe;
                kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
                kc[i].access = be->hdr.access;
@@ -1544,8 +1538,7 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
                err = soc_tplg_kcontrol_bind_io(&be->hdr, &kc[i], tplg);
                if (err) {
                        soc_control_err(tplg, &be->hdr, be->hdr.name);
-                       kfree(sbe);
-                       continue;
+                       goto err_sbe;
                }
 
                /* pass control to driver for optional further init */
@@ -1554,20 +1547,20 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
                if (err < 0) {
                        dev_err(tplg->dev, "ASoC: failed to init %s\n",
                                be->hdr.name);
-                       kfree(sbe);
-                       continue;
+                       goto err_sbe;
                }
        }
 
        return kc;
 
-err:
-       for (--i; i >= 0; i--) {
-               kfree((void *)kc[i].private_value);
+err_sbe:
+       for (; i >= 0; i--) {
+               sbe = (struct soc_bytes_ext *)kc[i].private_value;
+               kfree(sbe);
                kfree(kc[i].name);
        }
-
        kfree(kc);
+
        return NULL;
 }