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: 65f9f6f ("drm/i915/gvt: Optimize MMIO register handling for some large MMIO blocks") Signed-off-by: Xiong Zhang <[email protected]> Signed-off-by: Zhenyu Wang <[email protected]>
open-power · Aug 7, 2017 · d608659 · d608659
1 parent 02b6ed4
commit d608659
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -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;
 
 	/*