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x86: SGI UV: Fix BAU initialization
A memory mapped register that affects the SGI UV Broadcast Assist Unit's interrupt handling may sometimes be unintialized. Remove the condition on its initialization, as that condition can be randomly satisfied by a hardware reset. Signed-off-by: Cliff Wickman <cpw@sgi.com> Cc: <stable@kernel.org> LKML-Reference: <E1NBGB9-0005nU-Dp@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -819,10 +819,8 @@ static int __init uv_init_blade(int blade)
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*/
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apicid = blade_to_first_apicid(blade);
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pa = uv_read_global_mmr64(pnode, UVH_BAU_DATA_CONFIG);
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if ((pa & 0xff) != UV_BAU_MESSAGE) {
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uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
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uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
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((apicid << 32) | UV_BAU_MESSAGE));
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}
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return 0;
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}
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