[PATCH] Input: edt-ft5x06 - return -EFAULT on copy_to_user() error
From: Axel Lin <hidden>
Date: 2012-09-17 05:13:01
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
copy_to_user() returns the number of bytes remaining, but we want a negative error code here. Signed-off-by: Axel Lin <redacted> --- 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