From: Dave Airlie <airlied@linux.ie>
Date: Sat, 29 Mar 2008 21:53:58 +0000 (+1000)
Subject: drm/i915: fix oops on agp=off
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=144a75fa1faa4a81530bded2e59872ef80d496b6;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

drm/i915: fix oops on agp=off

From Kernel BZ 10289 - not sure why anyone would boot an intel with no agp
but it shouldn't crash.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index e9d6663bec73..a043bb12301a 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -804,6 +804,9 @@ void i915_driver_lastclose(struct drm_device * dev)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
 
+	if (!dev_priv)
+		return;
+
 	if (dev_priv->agp_heap)
 		i915_mem_takedown(&(dev_priv->agp_heap));