copy_to_user() returns the number of bytes remaining, but we want a negative error code here. Signed-off-by: Axel Lin <axel.lin@xxxxxxxxx> --- drivers/input/touchscreen/edt-ft5x06.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index bf00b32..02e9dab 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -567,7 +567,9 @@ 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) + if (error) + error = -EFAULT; + else *off += read; out: mutex_unlock(&tsdata->mutex); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
