drm/i915: avoid unclaimed registers when capturing the error state
Even though we only check for unclaimed registers while we're writing registers, if we read a bad register we'll still trigger a CPU error interrupt, and we'll print an "Unclaimed register" DRM_ERROR due to that. To avoid this error, just avoid touching power domains that are not enabled. Use kzalloc so we're sure all the disabled domains will be zeroed on the error state file. We already print the information that is enough to discover if the power well is enabled on the error state file, so this should not be a problem. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69747Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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