regmap: debugfs: Check return value of regmap_write()

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 23b701f..975719b 100644 (file)
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -265,6 +265,7 @@ static ssize_t regmap_map_write_file(struct file *file,
        char *start = buf;
        unsigned long reg, value;
        struct regmap *map = file->private_data;
+       int ret;
 
        buf_size = min(count, (sizeof(buf)-1));
        if (copy_from_user(buf, user_buf, buf_size))
@@ -282,7 +283,9 @@ static ssize_t regmap_map_write_file(struct file *file,
        /* Userspace has been fiddling around behind the kernel's back */
        add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
 
-       regmap_write(map, reg, value);
+       ret = regmap_write(map, reg, value);
+       if (ret < 0)
+               return ret;
        return buf_size;
 }
 #else