From 0980bb1ff0f0ef0a3fb08f7596167eda2c932b45 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 1 Aug 2022 18:56:34 +0200 Subject: [PATCH] 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 --- sound/aoa/soundbus/sysfs.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/sound/aoa/soundbus/sysfs.c b/sound/aoa/soundbus/sysfs.c index dead3105689b..e87b28428b99 100644 --- a/sound/aoa/soundbus/sysfs.c +++ b/sound/aoa/soundbus/sysfs.c @@ -10,19 +10,13 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, { struct soundbus_dev *sdev = to_soundbus_device(dev); struct platform_device *of = &sdev->ofdev; - int length; - if (*sdev->modalias) { - strscpy(buf, sdev->modalias, sizeof(sdev->modalias) + 1); - strcat(buf, "\n"); - length = strlen(buf); - } else { - length = sprintf(buf, "of:N%pOFn%c%s\n", - of->dev.of_node, 'T', - of_node_get_device_type(of->dev.of_node)); - } - - return length; + 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); @@ -32,7 +26,7 @@ static ssize_t name_show(struct device *dev, struct soundbus_dev *sdev = to_soundbus_device(dev); struct platform_device *of = &sdev->ofdev; - return sprintf(buf, "%pOFn\n", of->dev.of_node); + return sysfs_emit(buf, "%pOFn\n", of->dev.of_node); } static DEVICE_ATTR_RO(name); @@ -42,7 +36,7 @@ static ssize_t type_show(struct device *dev, struct soundbus_dev *sdev = to_soundbus_device(dev); struct platform_device *of = &sdev->ofdev; - return sprintf(buf, "%s\n", of_node_get_device_type(of->dev.of_node)); + return sysfs_emit(buf, "%s\n", of_node_get_device_type(of->dev.of_node)); } static DEVICE_ATTR_RO(type);