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lines changed Original file line number Diff line number Diff line change @@ -36,7 +36,12 @@ static void hdp_v6_0_flush_hdp(struct amdgpu_device *adev,
3636{
3737 if (!ring || !ring -> funcs -> emit_wreg ) {
3838 WREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
39- RREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 );
39+ /* We just need to read back a register to post the write.
40+ * Reading back the remapped register causes problems on
41+ * some platforms so just read back the memory size register.
42+ */
43+ if (adev -> nbio .funcs -> get_memsize )
44+ adev -> nbio .funcs -> get_memsize (adev );
4045 } else {
4146 amdgpu_ring_emit_wreg (ring , (adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
4247 }
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