From ee0c304532813996efa535523d15755bc04f40ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Fri, 10 Jan 2020 20:32:28 +0200
Subject: drm/i915: Cleanup properly if the implicit fence setup fails
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Git-commit: 6fef8510a7a51227620de74cc495916e6ba54773
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

We've already pinned the vma and fence by the time we try to
deal with implicit fencing. Properly unpin the vma and fence
if the fence setup fails instead of just bailing straight out
from .prepare_fb(). As can be expected
drm_atomic_helper_prepare_planes() will not call .cleanup_fb()
for the plane whose .prepare_fb() failed so we must do the
cleanup ourself.

v2: Rebase

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200110183228.8199-6-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/display/intel_display.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index f03594046c02..35659560142e 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -15803,7 +15803,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
 						      false, I915_FENCE_TIMEOUT,
 						      GFP_KERNEL);
 		if (ret < 0)
-			return ret;
+			goto unpin_fb;
 
 		fence = dma_resv_get_excl_rcu(obj->base.resv);
 		if (fence) {
@@ -15830,6 +15830,11 @@ intel_prepare_plane_fb(struct drm_plane *_plane,
 	}
 
 	return 0;
+
+unpin_fb:
+	intel_plane_unpin_fb(new_plane_state);
+
+	return ret;
 }
 
 /**
-- 
2.28.0