[PATCH] drm/i915: fix possible null pointer dereference

[Sudip Mukherjee]

We were dereferencing dev first and then checking if it is NULL. Lets
check for NULL first and then dereference.

Signed-off-by: Sudip Mukherjee <sudip at vectorindia.org>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c 
b/drivers/gpu/drm/i915/i915_debugfs.c
index bc817da..f316e49 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4100,12 +4100,13 @@ static int i915_displayport_test_active_show(struct 
seq_file *m, void *data)
 {
        struct drm_device *dev = m->private;
        struct drm_connector *connector;
-       struct list_head *connector_list = &dev->mode_config.connector_list;
+       struct list_head *connector_list;
        struct intel_dp *intel_dp;

        if (!dev)
                return -ENODEV;

+       connector_list = &dev->mode_config.connector_list;
        list_for_each_entry(connector, connector_list, head) {

                if (connector->connector_type !=
-- 
1.8.1.2