[Intel-gfx] [PATCH] drm/i915: avoid deadlock on failure paths in __intel_framebuffer_create()

[Alexey Khoroshilov]

Since a8bb6818270c __intel_framebuffer_create() is called
with struct_mutex held, so it should use drm_gem_object_unreference()
instead of drm_gem_object_unreference_unlocked().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshi...@ispras.ru>
---
 drivers/gpu/drm/i915/intel_display.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index f0a1a56406eb..80f3e5a03059 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8561,7 +8561,7 @@ __intel_framebuffer_create(struct drm_device *dev,
 
        intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
        if (!intel_fb) {
-               drm_gem_object_unreference_unlocked(&obj->base);
+               drm_gem_object_unreference(&obj->base);
                return ERR_PTR(-ENOMEM);
        }
 
@@ -8571,7 +8571,7 @@ __intel_framebuffer_create(struct drm_device *dev,
 
        return &intel_fb->base;
 err:
-       drm_gem_object_unreference_unlocked(&obj->base);
+       drm_gem_object_unreference(&obj->base);
        kfree(intel_fb);
 
        return ERR_PTR(ret);
-- 
1.9.1

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