Input: edt-ft5x06 - return -EFAULT on copy_to_user() error

copy_to_user() returns the number of bytes remaining, but we want a
negative error code here.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index b06a5e3a665ea1864c8824f6d7d172f87d0b3ac1..64957770b52209fcc527e3f015e21816b3165bc7 100644 (file)
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -566,9 +566,12 @@ static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
        }
 
        read = min_t(size_t, count, tsdata->raw_bufsize - *off);
-       error = copy_to_user(buf, tsdata->raw_buffer + *off, read);
-       if (!error)
-               *off += read;
+       if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
+               error = -EFAULT;
+               goto out;
+       }
+
+       *off += read;
 out:
        mutex_unlock(&tsdata->mutex);
        return error ?: read;