[PATCH] drm: Fix compiler warning in drm_atomic_helper.c

[Sean Paul]

From: Sean Paul <seanpaul at chromium.org>

Kbuild was complaining about:
>> drivers/gpu/drm/drm_atomic_helper.c:3169:27: warning: 'state' may be used uninitialized in this function [-Wmaybe-uninitialized]

Now state can't actually be used uninitialized, but we'll assign a value
anyways so it stops bellyaching.

Fixes: b7ea04d299c7 ("drm: Add DRM_MODESET_LOCK_BEGIN/END helpers")
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Sean Paul <seanpaul at chromium.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <maxime.ripard at bootlin.com>
Cc: Sean Paul <sean at poorly.run>
Cc: David Airlie <airlied at linux.ie>
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/drm_atomic_helper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 0d58c40aa4401..0ee83efeb94a4 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3169,6 +3169,9 @@ struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev)
 	struct drm_atomic_state *state;
 	int err;
 
+	/* This can never be returned, but it makes the compiler happy */
+	state = ERR_PTR(-EINVAL);
+
 	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
 
 	state = drm_atomic_helper_duplicate_state(dev, &ctx);
-- 
Sean Paul, Software Engineer, Google / Chromium OS