From: Maxime Ripard maxime@cerno.tech
[ Upstream commit e075a7811977ff51c917a65ed1896e08231d2615 ]
If the of_get_named_gpio_flags call fails in vc4_hdmi_bind, we jump to the err_unprepare_hsm label. That label will then call pm_runtime_disable and put_device on the DDC device.
We just retrieved the DDC device, so the latter is definitely justified. However at that point we still haven't called pm_runtime_enable, so the call to pm_runtime_disable is not supposed to be there.
Fixes: 10ee275cb12f ("drm/vc4: prepare for CEC support") Signed-off-by: Maxime Ripard maxime@cerno.tech Reviewed-by: Linus Walleij linus.walleij@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20210524131852.263883-1-maxime... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/vc4/vc4_hdmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 88a8cb840cd5..25a09aaf5883 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1795,7 +1795,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data) &hpd_gpio_flags); if (vc4_hdmi->hpd_gpio < 0) { ret = vc4_hdmi->hpd_gpio; - goto err_unprepare_hsm; + goto err_put_ddc; }
vc4_hdmi->hpd_active_low = hpd_gpio_flags & OF_GPIO_ACTIVE_LOW; @@ -1836,8 +1836,8 @@ err_destroy_conn: vc4_hdmi_connector_destroy(&vc4_hdmi->connector); err_destroy_encoder: drm_encoder_cleanup(encoder); -err_unprepare_hsm: pm_runtime_disable(dev); +err_put_ddc: put_device(&vc4_hdmi->ddc->dev);
return ret;