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ALSA: hda: 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 those usages
straightforwardly with new helpers, sysfs_emit() and sysfs_emit_at().

Link: https://lore.kernel.org/r/20220801165639.26030-7-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2022-08-01 18:56:38 +02:00
parent 01043e3e14
commit 17daae7ac4
2 changed files with 32 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
sound/hda/hdac_sysfs.c
View File

@ -22,7 +22,7 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hdac_device *codec = dev_to_hdac_dev(dev); \
return sprintf(buf, "0x%x\n", codec->type); \
return sysfs_emit(buf, "0x%x\n", codec->type); \
} \
static DEVICE_ATTR_RO(type)
@ -32,7 +32,7 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hdac_device *codec = dev_to_hdac_dev(dev); \
return sprintf(buf, "%s\n", \
return sysfs_emit(buf, "%s\n", \
codec->type ? codec->type : ""); \
} \
static DEVICE_ATTR_RO(type)
@ -161,7 +161,7 @@ static struct kobj_type widget_ktype = {
static ssize_t caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
return sprintf(buf, "0x%08x\n", get_wcaps(codec, nid));
return sysfs_emit(buf, "0x%08x\n", get_wcaps(codec, nid));
}
static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid,
@ -169,7 +169,7 @@ static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid,
{
if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP));
}
@ -182,7 +182,7 @@ static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid,
return 0;
if (snd_hdac_read(codec, nid, AC_VERB_GET_CONFIG_DEFAULT, 0, &val))
return 0;
return sprintf(buf, "0x%08x\n", val);
return sysfs_emit(buf, "0x%08x\n", val);
}
static bool has_pcm_cap(struct hdac_device *codec, hda_nid_t nid)
@ -203,7 +203,7 @@ static ssize_t pcm_caps_show(struct hdac_device *codec, hda_nid_t nid,
{
if (!has_pcm_cap(codec, nid))
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_PCM));
}
@ -212,7 +212,7 @@ static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid,
{
if (!has_pcm_cap(codec, nid))
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_STREAM));
}
@ -221,7 +221,7 @@ static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid,
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP))
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP));
}
@ -230,7 +230,7 @@ static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid,
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP))
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP));
}
@ -239,14 +239,14 @@ static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid,
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER))
return 0;
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE));
}
static ssize_t gpio_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
return sprintf(buf, "0x%08x\n",
return sysfs_emit(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP));
}
@ -261,8 +261,8 @@ static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid,
if (nconns <= 0)
return nconns;
for (i = 0; i < nconns; i++)
ret += sprintf(buf + ret, "%s0x%02x", i ? " " : "", list[i]);
ret += sprintf(buf + ret, "\n");
ret += sysfs_emit_at(buf, ret, "%s0x%02x", i ? " " : "", list[i]);
ret += sysfs_emit_at(buf, ret, "\n");
return ret;
}

17
sound/pci/hda/hda_sysfs.c
View File

@ -33,7 +33,7 @@ static ssize_t power_on_acct_show(struct device *dev,
{
struct hda_codec *codec = dev_get_drvdata(dev);
snd_hda_update_power_acct(codec);
return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
}
static ssize_t power_off_acct_show(struct device *dev,
@ -42,7 +42,7 @@ static ssize_t power_off_acct_show(struct device *dev,
{
struct hda_codec *codec = dev_get_drvdata(dev);
snd_hda_update_power_acct(codec);
return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
return sysfs_emit(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
}
static DEVICE_ATTR_RO(power_on_acct);
@ -55,7 +55,7 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hda_codec *codec = dev_get_drvdata(dev); \
return sprintf(buf, "0x%x\n", codec->field); \
return sysfs_emit(buf, "0x%x\n", codec->field); \
}
#define CODEC_INFO_STR_SHOW(type, field) \
@ -64,7 +64,7 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hda_codec *codec = dev_get_drvdata(dev); \
return sprintf(buf, "%s\n", \
return sysfs_emit(buf, "%s\n", \
codec->field ? codec->field : ""); \
}
@ -85,7 +85,7 @@ static ssize_t pin_configs_show(struct hda_codec *codec,
int i, len = 0;
mutex_lock(&codec->user_mutex);
snd_array_for_each(list, i, pin) {
len += sprintf(buf + len, "0x%02x 0x%08x\n",
len += sysfs_emit_at(buf, len, "0x%02x 0x%08x\n",
pin->nid, pin->cfg);
}
mutex_unlock(&codec->user_mutex);
@ -222,8 +222,7 @@ static ssize_t init_verbs_show(struct device *dev,
int i, len = 0;
mutex_lock(&codec->user_mutex);
snd_array_for_each(&codec->init_verbs, i, v) {
len += scnprintf(buf + len, PAGE_SIZE - len,
"0x%02x 0x%03x 0x%04x\n",
len += sysfs_emit_at(buf, len, "0x%02x 0x%03x 0x%04x\n",
v->nid, v->verb, v->param);
}
mutex_unlock(&codec->user_mutex);
@ -272,8 +271,8 @@ static ssize_t hints_show(struct device *dev,
int i, len = 0;
mutex_lock(&codec->user_mutex);
snd_array_for_each(&codec->hints, i, hint) {
len += scnprintf(buf + len, PAGE_SIZE - len,
"%s = %s\n", hint->key, hint->val);
len += sysfs_emit_at(buf, len, "%s = %s\n",
hint->key, hint->val);
}
mutex_unlock(&codec->user_mutex);
return len;