sun4i_rgb_init() can fail, which results in TCON failing to bind. In this case we need to do cleanup, specificly unregistering the dotclock, which is regmap based, and the regmap is registered as part of the sun4i_tcon_bind().
Failing to do so results in a NULL pointer reference when the CCF tries to turn off unused clocks.
Fixes: 29e57fab97fc ("drm: sun4i: Add RGB output") Signed-off-by: Chen-Yu Tsai wens@csie.org --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 9f19b0e08560..dea673275356 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -490,7 +490,11 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master, return 0; }
- return sun4i_rgb_init(drm); + ret = sun4i_rgb_init(drm); + if (ret < 0) + goto err_free_clocks; + + return 0;
err_free_clocks: sun4i_tcon_free_clocks(tcon);