ASoC: codecs: wcd9335: Simplify with cleanup.h

Allocate the memory with scoped/cleanup.h to reduce error handling (less
error paths) and make the code a bit simpler.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240703-asoc-cleanup-h-v1-3-71219dfd0aef@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wcd9335.c

@@ -5,6 +5,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/cleanup.h>
 #include <linux/device.h>
 #include <linux/wait.h>
 #include <linux/bitops.h>
@@ -2714,25 +2715,23 @@ static int wcd9335_codec_enable_dec(struct snd_soc_dapm_widget *w,
 	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
 	unsigned int decimator;
 	char *dec_adc_mux_name = NULL;
-	char *widget_name = NULL;
-	char *wname;
+	char *widget_name;
 	int ret = 0, amic_n;
 	u16 tx_vol_ctl_reg, pwr_level_reg = 0, dec_cfg_reg, hpf_gate_reg;
 	u16 tx_gain_ctl_reg;
 	char *dec;
 	u8 hpf_coff_freq;
 
-	widget_name = kmemdup_nul(w->name, 15, GFP_KERNEL);
-	if (!widget_name)
+	char *wname __free(kfree) = kmemdup_nul(w->name, 15, GFP_KERNEL);
+	if (!wname)
 		return -ENOMEM;
 
-	wname = widget_name;
+	widget_name = wname;
 	dec_adc_mux_name = strsep(&widget_name, " ");
 	if (!dec_adc_mux_name) {
 		dev_err(comp->dev, "%s: Invalid decimator = %s\n",
 			__func__, w->name);
-		ret =  -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 	dec_adc_mux_name = widget_name;
 
@@ -2740,16 +2739,14 @@ static int wcd9335_codec_enable_dec(struct snd_soc_dapm_widget *w,
 	if (!dec) {
 		dev_err(comp->dev, "%s: decimator index not found\n",
 			__func__);
-		ret =  -EINVAL;
-		goto out;
+		return  -EINVAL;
 	}
 
 	ret = kstrtouint(dec, 10, &decimator);
 	if (ret < 0) {
 		dev_err(comp->dev, "%s: Invalid decimator = %s\n",
 			__func__, wname);
-		ret =  -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 
 	tx_vol_ctl_reg = WCD9335_CDC_TX0_TX_PATH_CTL + 16 * decimator;
@@ -2836,8 +2833,7 @@ static int wcd9335_codec_enable_dec(struct snd_soc_dapm_widget *w,
 		snd_soc_component_update_bits(comp, tx_vol_ctl_reg, 0x10, 0x00);
 		break;
 	}
-out:
-	kfree(wname);
+
 	return ret;
 }