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lines changed Original file line number Diff line number Diff line change @@ -33,7 +33,12 @@ static void hdp_v5_0_flush_hdp(struct amdgpu_device *adev,
3333{
3434 if (!ring || !ring -> funcs -> emit_wreg ) {
3535 WREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
36- RREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 );
36+ /* We just need to read back a register to post the write.
37+ * Reading back the remapped register causes problems on
38+ * some platforms so just read back the memory size register.
39+ */
40+ if (adev -> nbio .funcs -> get_memsize )
41+ adev -> nbio .funcs -> get_memsize (adev );
3742 } else {
3843 amdgpu_ring_emit_wreg (ring , (adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
3944 }
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