drm/i915: Use request_firmware and our own async work
Two benefits: - We can use FW_LOADER_USERSPACE_FALLBACK. - We can use flush_work to synchronize with the oustanding worker, which is a notch more obvious what it does than having a special completion. The next patch will properly synchronize against the async loader in the resume and unload code. Cc: Damien Lespiau <damien.lespiau@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Sunil Kamath <sunil.kamath@intel.com> Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com> Signed-off-by: NAnimesh Manna <animesh.manna@intel.com> Signed-off-by: NImre Deak <imre.deak@intel.com> Tested-by: Daniel Stone <daniels@collabora.com> # SKL Signed-off-by: NJani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1446069547-24760-11-git-send-email-imre.deak@intel.com
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