diff options
Diffstat (limited to 'drivers/base/regmap/regmap-debugfs.c')
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index f3266334063e..87b562e49a43 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -25,6 +25,7 @@ struct regmap_debugfs_node { struct list_head link; }; +static unsigned int dummy_index; static struct dentry *regmap_debugfs_root; static LIST_HEAD(regmap_debugfs_early_list); static DEFINE_MUTEX(regmap_debugfs_early_lock); @@ -40,6 +41,7 @@ static ssize_t regmap_name_read_file(struct file *file, loff_t *ppos) { struct regmap *map = file->private_data; + const char *name = "nodev"; int ret; char *buf; @@ -47,7 +49,10 @@ static ssize_t regmap_name_read_file(struct file *file, if (!buf) return -ENOMEM; - ret = snprintf(buf, PAGE_SIZE, "%s\n", map->dev->driver->name); + if (map->dev && map->dev->driver) + name = map->dev->driver->name; + + ret = snprintf(buf, PAGE_SIZE, "%s\n", name); if (ret < 0) { kfree(buf); return ret; @@ -569,9 +574,20 @@ void regmap_debugfs_init(struct regmap *map, const char *name) name = devname; } + if (!strcmp(name, "dummy")) { + map->debugfs_name = kasprintf(GFP_KERNEL, "dummy%d", + dummy_index); + name = map->debugfs_name; + dummy_index++; + } + map->debugfs = debugfs_create_dir(name, regmap_debugfs_root); if (!map->debugfs) { - dev_warn(map->dev, "Failed to create debugfs directory\n"); + dev_warn(map->dev, + "Failed to create %s debugfs directory\n", name); + + kfree(map->debugfs_name); + map->debugfs_name = NULL; return; } |