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Take advantage of calling xcs_resume under a forcewake by using direct mmio access. In particular, we can avoid the sleeping variants to allow resume to be called from softirq context, required for engine resets. v2: Keep the posting read at the start of resume as a guardian memory barrier. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210119110802.22228-5-chris@chris-wilson.co.uk |
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