[PATCH v3 06/20] drm: bridge: dw-hdmi: Don't forward HPD events to DRM core before attach

[Laurent Pinchart]

Hotplug events should only be forwarded to the DRM core by the interrupt
handler when the bridge has been attached, otherwise the DRM device
pointer will be NULL, resulting in a crash.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu at synopsys.com>
---
 drivers/gpu/drm/bridge/dw-hdmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index ef10bb866b2f..488dc1a9204f 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -1805,7 +1805,8 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 	if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
 		dev_dbg(hdmi->dev, "EVENT=%s\n",
 			phy_int_pol & HDMI_PHY_HPD ? "plugin" : "plugout");
-		drm_helper_hpd_irq_event(hdmi->bridge.dev);
+		if (hdmi->bridge.dev)
+			drm_helper_hpd_irq_event(hdmi->bridge.dev);
 	}
 
 	hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
-- 
Regards,

Laurent Pinchart