drm/rockchip: vop: Fix call to crtc reset helper

[ Upstream commit 5aacd290837828c089a83ac9795c74c4c9e2c923 ]

Allocation of crtc_state may fail in vop_crtc_reset, causing an invalid
pointer to be passed to __drm_atomic_helper_crtc_reset.

Fix this by adding a NULL check of crtc_state, similar to other drivers.

Fixes: 01e2eaf40c9d ("drm/rockchip: Convert to using __drm_atomic_helper_crtc_reset() for reset.")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230621223311.2239547-4-jonas@kwiboo.se
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 06f647a..41cd12d 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1640,7 +1640,10 @@ static void vop_crtc_reset(struct drm_crtc *crtc)
        if (crtc->state)
                vop_crtc_destroy_state(crtc, crtc->state);
 
-       __drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
+       if (crtc_state)
+               __drm_atomic_helper_crtc_reset(crtc, &crtc_state->base);
+       else
+               __drm_atomic_helper_crtc_reset(crtc, NULL);
 }
 
 #ifdef CONFIG_DRM_ANALOGIX_DP