drm/i915: Call i915_perf_fini() on init_hw error unwind
We have to cleanup after i915_perf_init(), even on the error path, as it passes a pointer into the module to the sysfs core. If we fail to unregister the sysctl table, we leave a dangling pointer which then may explode anytime later. Fixes: 9f9b2792 ("drm/i915/perf: reuse timestamp frequency from device info") Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by: NLionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: NMichal Wajdeczko <michal.wajdeczko@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180414091233.32224-1-chris@chris-wilson.co.uk
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