linux/sound/aoa/soundbus/sysfs.c
Takashi Iwai 0980bb1ff0 ALSA: aoa: Replace sprintf() with sysfs_emit()
For sysfs outputs, it's safer to use a new helper, sysfs_emit(),
instead of the raw sprintf() & co.  This patch replaces such sprintf()
calls with sysfs_emit() while simplifying the open code in
modalias_show(); as modalias[] is a NUL-terminated string, we can pass
it straightly to a printf() argument.

Link: https://lore.kernel.org/r/20220801165639.26030-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-08-02 16:03:42 +02:00

49 lines
1.2 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/stat.h>
/* FIX UP */
#include "soundbus.h"
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct soundbus_dev *sdev = to_soundbus_device(dev);
struct platform_device *of = &sdev->ofdev;
if (*sdev->modalias)
return sysfs_emit(buf, "%s\n", sdev->modalias);
else
return sysfs_emit(buf, "of:N%pOFn%c%s\n",
of->dev.of_node, 'T',
of_node_get_device_type(of->dev.of_node));
}
static DEVICE_ATTR_RO(modalias);
static ssize_t name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct soundbus_dev *sdev = to_soundbus_device(dev);
struct platform_device *of = &sdev->ofdev;
return sysfs_emit(buf, "%pOFn\n", of->dev.of_node);
}
static DEVICE_ATTR_RO(name);
static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct soundbus_dev *sdev = to_soundbus_device(dev);
struct platform_device *of = &sdev->ofdev;
return sysfs_emit(buf, "%s\n", of_node_get_device_type(of->dev.of_node));
}
static DEVICE_ATTR_RO(type);
struct attribute *soundbus_dev_attrs[] = {
&dev_attr_name.attr,
&dev_attr_type.attr,
&dev_attr_modalias.attr,
NULL,
};