From: Michal Wajdeczko <michal.wajdeczko@intel.com>
Date: Mon, 6 Nov 2017 13:51:54 +0000 (+0000)
Subject: drm/i915/guc: Assert ctch->vma is allocated
X-Git-Tag: android-x86-8.1-r1~365^2~46^2~1193
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=1c5a907180365d0842c17fb15977ad426d429c14;p=android-x86%2Fkernel.git

drm/i915/guc: Assert ctch->vma is allocated

Silence smatch by demonstrating that ctch->vma is allocated
following a successful chch_init()

drivers/gpu/drm/i915/intel_guc_ct.c:204 ctch_open() error:
 we previously assumed 'ctch->vma' could be null (see line 197)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171106135154.52520-1-michal.wajdeczko@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---

diff --git a/drivers/gpu/drm/i915/intel_guc_ct.c b/drivers/gpu/drm/i915/intel_guc_ct.c
index c4cbec140101..24ad55752396 100644
--- a/drivers/gpu/drm/i915/intel_guc_ct.c
+++ b/drivers/gpu/drm/i915/intel_guc_ct.c
@@ -198,6 +198,7 @@ static int ctch_open(struct intel_guc *guc,
 		err = ctch_init(guc, ctch);
 		if (unlikely(err))
 			goto err_out;
+		GEM_BUG_ON(!ctch->vma);
 	}
 
 	/* vma should be already allocated and map'ed */