diff options
Diffstat (limited to 'drivers/base/regmap/regmap-debugfs.c')
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index f42f2bac6466..3f0a7e262d69 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -30,10 +30,9 @@ static LIST_HEAD(regmap_debugfs_early_list); static DEFINE_MUTEX(regmap_debugfs_early_lock); /* Calculate the length of a fixed format */ -static size_t regmap_calc_reg_len(int max_val, char *buf, size_t buf_size) +static size_t regmap_calc_reg_len(int max_val) { - snprintf(buf, buf_size, "%x", max_val); - return strlen(buf); + return snprintf(NULL, 0, "%x", max_val); } static ssize_t regmap_name_read_file(struct file *file, @@ -174,8 +173,7 @@ static inline void regmap_calc_tot_len(struct regmap *map, { /* Calculate the length of a fixed format */ if (!map->debugfs_tot_len) { - map->debugfs_reg_len = regmap_calc_reg_len(map->max_register, - buf, count); + map->debugfs_reg_len = regmap_calc_reg_len(map->max_register), map->debugfs_val_len = 2 * map->format.val_bytes; map->debugfs_tot_len = map->debugfs_reg_len + map->debugfs_val_len + 3; /* : \n */ @@ -339,6 +337,7 @@ static ssize_t regmap_reg_ranges_read_file(struct file *file, char *buf; char *entry; int ret; + unsigned entry_len; if (*ppos < 0 || !count) return -EINVAL; @@ -366,18 +365,15 @@ static ssize_t regmap_reg_ranges_read_file(struct file *file, p = 0; mutex_lock(&map->cache_lock); list_for_each_entry(c, &map->debugfs_off_cache, list) { - snprintf(entry, PAGE_SIZE, "%x-%x", - c->base_reg, c->max_reg); + entry_len = snprintf(entry, PAGE_SIZE, "%x-%x\n", + c->base_reg, c->max_reg); if (p >= *ppos) { - if (buf_pos + 1 + strlen(entry) > count) + if (buf_pos + entry_len > count) break; - snprintf(buf + buf_pos, count - buf_pos, - "%s", entry); - buf_pos += strlen(entry); - buf[buf_pos] = '\n'; - buf_pos++; + memcpy(buf + buf_pos, entry, entry_len); + buf_pos += entry_len; } - p += strlen(entry) + 1; + p += entry_len; } mutex_unlock(&map->cache_lock); @@ -421,7 +417,7 @@ static ssize_t regmap_access_read_file(struct file *file, return -ENOMEM; /* Calculate the length of a fixed format */ - reg_len = regmap_calc_reg_len(map->max_register, buf, count); + reg_len = regmap_calc_reg_len(map->max_register); tot_len = reg_len + 10; /* ': R W V P\n' */ for (i = 0; i <= map->max_register; i += map->reg_stride) { @@ -432,7 +428,7 @@ static ssize_t regmap_access_read_file(struct file *file, /* If we're in the region the user is trying to read */ if (p >= *ppos) { /* ...but not beyond it */ - if (buf_pos >= count - 1 - tot_len) + if (buf_pos + tot_len + 1 >= count) break; /* Format the register */ |