[PATCH] regmap: Fallback to dev_name(map->dev) in case there is no `driver'

[Dimitris Papastamos]

This is useful when we want to use regmap with character devices.

Signed-off-by: Dimitris Papastamos <dp@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 drivers/base/regmap/regmap-debugfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index bb1ff17..c2fbf57 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -39,7 +39,10 @@ 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->driver && map->dev->driver->name)
+		ret = snprintf(buf, PAGE_SIZE, "%s\n", map->dev->driver->name);
+	else
+		ret = snprintf(buf, PAGE_SIZE, "%s\n", dev_name(map->dev));
 	if (ret < 0) {
 		kfree(buf);
 		return ret;
-- 
1.7.11.2

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