soundwire: intel: simplify with cleanup.h

Allocate the memory with scoped/cleanup.h to reduce error handling and
make the code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240703-soundwire-cleanup-h-v1-5-24fa0dbb948f@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: krzk

drivers/soundwire/intel.c

@@ -6,6 +6,7 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/cleanup.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/io.h>
@@ -73,12 +74,11 @@ static int intel_reg_show(struct seq_file *s_file, void *data)
 	struct sdw_intel *sdw = s_file->private;
 	void __iomem *s = sdw->link_res->shim;
 	void __iomem *a = sdw->link_res->alh;
-	char *buf;
 	ssize_t ret;
 	int i, j;
 	unsigned int links, reg;
 
-	buf = kzalloc(RD_BUF, GFP_KERNEL);
+	char *buf __free(kfree) = kzalloc(RD_BUF, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 
@@ -129,7 +129,6 @@ static int intel_reg_show(struct seq_file *s_file, void *data)
 		ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));
 
 	seq_printf(s_file, "%s", buf);
-	kfree(buf);
 
 	return 0;
 }
@@ -727,7 +726,6 @@ static int intel_hw_params(struct snd_pcm_substream *substream,
 	struct sdw_cdns_dai_runtime *dai_runtime;
 	struct sdw_cdns_pdi *pdi;
 	struct sdw_stream_config sconfig;
-	struct sdw_port_config *pconfig;
 	int ch, dir;
 	int ret;
 
@@ -771,7 +769,8 @@ static int intel_hw_params(struct snd_pcm_substream *substream,
 	sconfig.bps = snd_pcm_format_width(params_format(params));
 
 	/* Port configuration */
-	pconfig = kzalloc(sizeof(*pconfig), GFP_KERNEL);
+	struct sdw_port_config *pconfig __free(kfree) = kzalloc(sizeof(*pconfig),
+								GFP_KERNEL);
 	if (!pconfig)
 		return -ENOMEM;
 
@@ -783,8 +782,6 @@ static int intel_hw_params(struct snd_pcm_substream *substream,
 	if (ret)
 		dev_err(cdns->dev, "add master to stream failed:%d\n", ret);
 
-	kfree(pconfig);
-
 	return ret;
 }