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While srcu may use an integer tag, it does not exclude potential error codes and so may overlap with our own use of -EINTR. Use a separate outparam to store the tag, and report the error code separately. Fixes:2caffbf117("drm/i915: Revoke mmaps and prevent access to fence registers across reset") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190912160834.30601-1-chris@chris-wilson.co.uk (cherry picked from commiteebab60f22) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>