soundwire: debugfs: 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-v1-9-24fa0dbb948f@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/debugfs.c b/drivers/soundwire/debugfs.c
index 6d253d69871d900108952f11bb31ce283d9ae33d..c30f571934ee2e84ff4387833c60dc7b42a2b843 100644 (file)
--- a/drivers/soundwire/debugfs.c
+++ b/drivers/soundwire/debugfs.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 // Copyright(c) 2017-2019 Intel Corporation.
 
+#include <linux/cleanup.h>
 #include <linux/device.h>
 #include <linux/debugfs.h>
 #include <linux/firmware.h>
@@ -49,18 +50,16 @@ static ssize_t sdw_sprintf(struct sdw_slave *slave,
 static int sdw_slave_reg_show(struct seq_file *s_file, void *data)
 {
        struct sdw_slave *slave = s_file->private;
-       char *buf;
        ssize_t ret;
        int i, j;
 
-       buf = kzalloc(RD_BUF, GFP_KERNEL);
+       char *buf __free(kfree) = kzalloc(RD_BUF, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;
 
        ret = pm_runtime_get_sync(&slave->dev);
        if (ret < 0 && ret != -EACCES) {
                pm_runtime_put_noidle(&slave->dev);
-               kfree(buf);
                return ret;
        }
 
@@ -132,8 +131,6 @@ static int sdw_slave_reg_show(struct seq_file *s_file, void *data)
        pm_runtime_mark_last_busy(&slave->dev);
        pm_runtime_put(&slave->dev);
 
-       kfree(buf);
-
        return 0;
 }
 DEFINE_SHOW_ATTRIBUTE(sdw_slave_reg);