[PATCH 4/4] drm/i915: Fix oops on platforms w/o hpd support

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

We don't have hpd support on i8xx/i915 which means hotplug_funcs==NULL.
Let's not oops when loading the driver on one those machines.

Cc: Dave Airlie <airlied at redhat.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Fixes: cd030c7c11a4 ("drm/i915: constify hotplug function vtable.")
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_hotplug.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index 3c1cec953b42..0e949a258a22 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -215,7 +215,8 @@ intel_hpd_irq_storm_switch_to_polling(struct drm_i915_private *dev_priv)
 
 static void intel_hpd_irq_setup(struct drm_i915_private *i915)
 {
-	if (i915->display_irqs_enabled && i915->hotplug_funcs->hpd_irq_setup)
+	if (i915->display_irqs_enabled &&
+	    i915->hotplug_funcs && i915->hotplug_funcs->hpd_irq_setup)
 		i915->hotplug_funcs->hpd_irq_setup(i915);
 }
 
-- 
2.32.0