[PATCH] drm: self_refresh: Fix a reversed condition in drm_self_refresh_helper_cleanup()

[Dan Carpenter]

This test is flipped around so it either leads to a memory leak or a
NULL dereference.

Fixes: 1452c25b0e60 ("drm: Add helpers to kick off self refresh mode in drivers")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
I'm not totally sure what the prefered patch prefix for this code.  One
thing that would help is when we're adding new files we should specify
the prefix that they're going to use:

- drm: Add helpers to kick off self refresh mode in drivers
+ drm: refresh mode: Add helpers to kick off self refresh mode in drivers

It's a small thing and email always sounds whiny but I'm sending this
suggestion to everyone today so...

 drivers/gpu/drm/drm_self_refresh_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_self_refresh_helper.c b/drivers/gpu/drm/drm_self_refresh_helper.c
index 2b3daaf77841..e0d2ad1f070c 100644
--- a/drivers/gpu/drm/drm_self_refresh_helper.c
+++ b/drivers/gpu/drm/drm_self_refresh_helper.c
@@ -205,7 +205,7 @@ void drm_self_refresh_helper_cleanup(struct drm_crtc *crtc)
 	struct drm_self_refresh_data *sr_data = crtc->self_refresh_data;
 
 	/* Helper is already uninitialized */
-	if (sr_data)
+	if (!sr_data)
 		return;
 
 	crtc->self_refresh_data = NULL;
-- 
2.20.1