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().
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
sound/hda/hdac_sysfs.c | 42 +++++++++++++++++++--------------------
sound/pci/hda/hda_sysfs.c | 23 ++++++++++-----------
2 files changed, 32 insertions(+), 33 deletions(-)
diff --git a/sound/hda/hdac_sysfs.c b/sound/hda/hdac_sysfs.c
index 0d7771fca9f0..e47de49a32e3 100644
--- a/sound/hda/hdac_sysfs.c
+++ b/sound/hda/hdac_sysfs.c
@@ -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)
@@ -32,8 +32,8 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hdac_device *codec = dev_to_hdac_dev(dev); \
- return sprintf(buf, "%s\n", \
- codec->type ? codec->type : ""); \
+ 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,
@@ -169,8 +169,8 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP));
}
static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid,
@@ -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)
@@ -203,8 +203,8 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_PCM));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_PCM));
}
static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid,
@@ -212,8 +212,8 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_STREAM));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_STREAM));
}
static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid,
@@ -221,8 +221,8 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP));
}
static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid,
@@ -230,8 +230,8 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP));
}
static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid,
@@ -239,15 +239,15 @@ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE));
+ 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",
- snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP));
+ return sysfs_emit(buf, "0x%08x\n",
+ snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP));
}
static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid,
@@ -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;
}
diff --git a/sound/pci/hda/hda_sysfs.c b/sound/pci/hda/hda_sysfs.c
index d5ffcba794e5..bf951c10ae61 100644
--- a/sound/pci/hda/hda_sysfs.c
+++ b/sound/pci/hda/hda_sysfs.c
@@ -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) \
@@ -64,8 +64,8 @@ static ssize_t type##_show(struct device *dev, \
char *buf) \
{ \
struct hda_codec *codec = dev_get_drvdata(dev); \
- return sprintf(buf, "%s\n", \
- codec->field ? codec->field : ""); \
+ return sysfs_emit(buf, "%s\n", \
+ codec->field ? codec->field : ""); \
}
CODEC_INFO_SHOW(vendor_id, core.vendor_id);
@@ -85,8 +85,8 @@ 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",
- pin->nid, pin->cfg);
+ len += sysfs_emit_at(buf, len, "0x%02x 0x%08x\n",
+ pin->nid, pin->cfg);
}
mutex_unlock(&codec->user_mutex);
return len;
@@ -222,9 +222,8 @@ 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",
- v->nid, v->verb, v->param);
+ len += sysfs_emit_at(buf, len, "0x%02x 0x%03x 0x%04x\n",
+ v->nid, v->verb, v->param);
}
mutex_unlock(&codec->user_mutex);
return len;
@@ -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;
--
2.35.3
