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drm/i915/gvt: Change the max length of mmio_reg_rw from 4 to 8 

When linux guest access mmio with __raw_i915_read64 or __raw_i915_write64,
its length is 8 bytes.

This fix the linux guest in xengt couldn't boot up as it fail in
reading pv_info->magic.

Fixes: 65f9f6febf ("drm/i915/gvt: Optimize MMIO register handling for some large MMIO blocks")
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Xiong Zhang 2017-08-02 10:31:01 +08:00 committed by Zhenyu Wang
parent 02b6ed4430
commit d6086598d3
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gvt/handlers.c
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@ -3028,7 +3028,7 @@ int intel_vgpu_mmio_reg_rw(struct intel_vgpu *vgpu, unsigned int offset,
gvt_mmio_func func;
int ret;
if (WARN_ON(bytes > 4))
if (WARN_ON(bytes > 8))
return -EINVAL;
/*