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ARM has a 2000us limit for udelay. Switch to msleep. This code executes in a worker thread so shouldn't be an atomic context. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191217204707.2258744-2-alexander.deucher@amd.com