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drm/hisilicon: Code refactoring for hibmc_drv_de
[ Upstream commit 13b0d4a ] The memory used to be allocated with devres helpers and released automatically. In rare circumstances, the memory's release could have happened before the DRM device got released, which would have caused memory corruption of some kind. Now we're embedding the data structures in struct hibmc_drm_private. The whole release problem has been resolved, because struct hibmc_drm_private is allocated with drmm_kzalloc and always released with the DRM device. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/1597218179-3938-3-git-send-email-tiantao6@hisilicon.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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