[PATCH 4.4 31/36] drm/atomic: fix an error code in mode_fixup()

From: Greg Kroah-Hartman
Date: Mon Mar 13 2017 - 05:19:45 EST

4.4-stable review patch. If anyone has any objections, please let me know.


From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit f9ad86e42d0303eeb8e0d41bb208153022ebd9d2 upstream.

Having "ret" be a bool type works for everything except
ret = funcs->atomic_check(). The other functions all return zero on
error but ->atomic_check() returns negative error codes. We want to
propagate the error code but instead we return 1.

I found this bug with static analysis and I don't know if it affects
run time.

Fixes: 4cd4df8080a3 ("drm/atomic: Add ->atomic_check() to encoder helpers")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170207234601.GA23981@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/gpu/drm/drm_atomic_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -265,7 +265,7 @@ mode_fixup(struct drm_atomic_state *stat
struct drm_connector *connector;
struct drm_connector_state *conn_state;
int i;
- bool ret;
+ int ret;

for_each_crtc_in_state(state, crtc, crtc_state, i) {
if (!crtc_state->mode_changed &&