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PM / devfreq: Convert to use sysfs_emit_at() API

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Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Link: https://lore.kernel.org/all/20231024183016.14648-3-ansuelsmth@gmail.com/
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Christian Marangi 2023-10-24 20:30:16 +02:00 committed by Chanwoo Choi
parent 08e23d05fa
commit 4920ee6dcf
1 changed files with 17 additions and 20 deletions
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37
drivers/devfreq/devfreq.c
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@ -1697,7 +1697,7 @@ static ssize_t trans_stat_show(struct device *dev,
max_state = df->max_state;
if (max_state == 0)
return scnprintf(buf, PAGE_SIZE, "Not Supported.\n");
return sysfs_emit(buf, "Not Supported.\n");
mutex_lock(&df->lock);
if (!df->stop_polling &&
@ -1707,47 +1707,44 @@ static ssize_t trans_stat_show(struct device *dev,
}
mutex_unlock(&df->lock);
len += scnprintf(buf + len, PAGE_SIZE - len, " From : To\n");
len += scnprintf(buf + len, PAGE_SIZE - len, " :");
len += sysfs_emit_at(buf, len, " From : To\n");
len += sysfs_emit_at(buf, len, " :");
for (i = 0; i < max_state; i++) {
if (len >= PAGE_SIZE - 1)
break;
len += scnprintf(buf + len, PAGE_SIZE - len, "%10lu",
df->freq_table[i]);
len += sysfs_emit_at(buf, len, "%10lu",
df->freq_table[i]);
}
if (len >= PAGE_SIZE - 1)
return PAGE_SIZE - 1;
len += scnprintf(buf + len, PAGE_SIZE - len, " time(ms)\n");
len += sysfs_emit_at(buf, len, " time(ms)\n");
for (i = 0; i < max_state; i++) {
if (len >= PAGE_SIZE - 1)
break;
if (df->freq_table[i] == df->previous_freq)
len += scnprintf(buf + len, PAGE_SIZE - len, "*");
if (df->freq_table[2] == df->previous_freq)
len += sysfs_emit_at(buf, len, "*");
else
len += scnprintf(buf + len, PAGE_SIZE - len, " ");
len += sysfs_emit_at(buf, len, " ");
if (len >= PAGE_SIZE - 1)
break;
len += scnprintf(buf + len, PAGE_SIZE - len, "%10lu:",
df->freq_table[i]);
len += sysfs_emit_at(buf, len, "%10lu:", df->freq_table[i]);
for (j = 0; j < max_state; j++) {
if (len >= PAGE_SIZE - 1)
break;
len += scnprintf(buf + len, PAGE_SIZE - len, "%10u",
df->stats.trans_table[(i * max_state) + j]);
len += sysfs_emit_at(buf, len, "%10u",
df->stats.trans_table[(i * max_state) + j]);
}
if (len >= PAGE_SIZE - 1)
break;
len += scnprintf(buf + len, PAGE_SIZE - len, "%10llu\n", (u64)
jiffies64_to_msecs(df->stats.time_in_state[i]));
len += sysfs_emit_at(buf, len, "%10llu\n", (u64)
jiffies64_to_msecs(df->stats.time_in_state[i]));
}
if (len < PAGE_SIZE - 1)
len += scnprintf(buf + len, PAGE_SIZE - len, "Total transition : %u\n",
df->stats.total_trans);
len += sysfs_emit_at(buf, len, "Total transition : %u\n",
df->stats.total_trans);
if (len >= PAGE_SIZE - 1) {
pr_warn_once("devfreq transition table exceeds PAGE_SIZE. Disabling\n");
return -EFBIG;