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lines changed Original file line number Diff line number Diff line change @@ -42,7 +42,12 @@ static void hdp_v4_0_flush_hdp(struct amdgpu_device *adev,
4242{
4343 if (!ring || !ring -> funcs -> emit_wreg ) {
4444 WREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
45- RREG32 ((adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 );
45+ /* We just need to read back a register to post the write.
46+ * Reading back the remapped register causes problems on
47+ * some platforms so just read back the memory size register.
48+ */
49+ if (adev -> nbio .funcs -> get_memsize )
50+ adev -> nbio .funcs -> get_memsize (adev );
4651 } else {
4752 amdgpu_ring_emit_wreg (ring , (adev -> rmmio_remap .reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL ) >> 2 , 0 );
4853 }
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