clang reportes this error
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2322:8: error:
variable 'possible_crtcs' is used uninitialized whenever 'if'
condition is false [-Werror,-Wsometimes-uninitialized]
if (vp) {
^~
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2336:36: note:
uninitialized use occurs here
ret = vop2_plane_init(vop2, win, possible_crtcs);
^~~~~~~~~~~~~~
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c:2322:4:
note: remove the 'if' if its condition is always true
if (vp) {
^~~~~~~~
The else-statement changes the win->type to OVERLAY without setting the
possible_crtcs variable. Rework the block, initialize possible_crtcs to
0 to remove the else-statement. Split the else-if-statement out to its
own if-statement so the OVERLAY check will catch when the win-type has
been changed.
Fixes: 368419a2d429 ("drm/rockchip: vop2: initialize possible_crtcs properly")
Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
---
drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 03ca32cd2050..fce992c3506f 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -2301,7 +2301,7 @@ static int vop2_create_crtcs(struct vop2 *vop2)
nvp = 0;
for (i = 0; i < vop2->registered_num_wins; i++) {
struct vop2_win *win = &vop2->win[i];
- u32 possible_crtcs;
+ u32 possible_crtcs = 0;
if (vop2->data->soc_id == 3566) {
/*
@@ -2327,12 +2327,11 @@ static int vop2_create_crtcs(struct vop2 *vop2)
/* change the unused primary window to overlay window */
win->type = DRM_PLANE_TYPE_OVERLAY;
}
- } else if (win->type == DRM_PLANE_TYPE_OVERLAY) {
- possible_crtcs = (1 << nvps) - 1;
- } else {
- possible_crtcs = 0;
}
+ if (win->type == DRM_PLANE_TYPE_OVERLAY)
+ possible_crtcs = (1 << nvps) - 1;
+
ret = vop2_plane_init(vop2, win, possible_crtcs);
if (ret) {
drm_err(vop2->drm, "failed to init plane %s: %d\n",
--
2.27.0
