diff options
author | Haishan Zhou <zhssmail@gmail.com> | 2017-06-30 11:43:42 +0800 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2017-06-30 12:56:42 +0100 |
commit | dbc559554086f176b04f97eec561ad26ee54e47c (patch) | |
tree | a955b18c6b9ce14f6446286ea3f96fde5bc11cf3 /drivers/regulator | |
parent | 062171973e05440673cb997e64395e84a8e66350 (diff) | |
download | linux-dbc559554086f176b04f97eec561ad26ee54e47c.tar.bz2 |
regulator: core: Fix size limit of supply_map
Now the debugfs file supply_map has a size limit PAGE_SIZE and the user
can not see the whole content of regulator_map_list when it is larger
than this limit.
This patch uses seq_file instead to make sure supply_map shows the full
information of regulator_map_list.
Signed-off-by: Haishan Zhou <zhssmail@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/core.c | 36 |
1 files changed, 13 insertions, 23 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a0362a63902e..f8e76f73da35 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -4311,41 +4311,31 @@ void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) EXPORT_SYMBOL_GPL(regulator_get_init_drvdata); #ifdef CONFIG_DEBUG_FS -static ssize_t supply_map_read_file(struct file *file, char __user *user_buf, - size_t count, loff_t *ppos) +static int supply_map_show(struct seq_file *sf, void *data) { - char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); - ssize_t len, ret = 0; struct regulator_map *map; - if (!buf) - return -ENOMEM; - list_for_each_entry(map, ®ulator_map_list, list) { - len = snprintf(buf + ret, PAGE_SIZE - ret, - "%s -> %s.%s\n", - rdev_get_name(map->regulator), map->dev_name, - map->supply); - if (len >= 0) - ret += len; - if (ret > PAGE_SIZE) { - ret = PAGE_SIZE; - break; - } + seq_printf(sf, "%s -> %s.%s\n", + rdev_get_name(map->regulator), map->dev_name, + map->supply); } - ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); - - kfree(buf); + return 0; +} - return ret; +static int supply_map_open(struct inode *inode, struct file *file) +{ + return single_open(file, supply_map_show, inode->i_private); } #endif static const struct file_operations supply_map_fops = { #ifdef CONFIG_DEBUG_FS - .read = supply_map_read_file, - .llseek = default_llseek, + .open = supply_map_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, #endif }; |