[added to the 3.18 stable tree] drm/gma500: Use correct unref in the gem bo create function

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From: Daniel Vetter <daniel.vetter@xxxxxxxx>

This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.

===============

[ Upstream commit d3e376f52d095103ca51dbda4d6ff8aaf488f98f ]

This is called without dev->struct_mutex held, we need to use the
_unlocked variant.

Never caught in the wild since you'd need an evil userspace which
races a gem_close ioctl call with the in-progress open.

Cc: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/1448271183-20523-17-git-send-email-daniel.vetter@xxxxxxxx
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
 drivers/gpu/drm/gma500/gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index c707fa6..e3bdc8b 100644
--- a/drivers/gpu/drm/gma500/gem.c
+++ b/drivers/gpu/drm/gma500/gem.c
@@ -130,7 +130,7 @@ int psb_gem_create(struct drm_file *file, struct drm_device *dev, u64 size,
 		return ret;
 	}
 	/* We have the initial and handle reference but need only one now */
-	drm_gem_object_unreference(&r->gem);
+	drm_gem_object_unreference_unlocked(&r->gem);
 	*handlep = handle;
 	return 0;
 }
-- 
2.5.0

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