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    Subject[PATCH] Fix UV4 Hub Revision adjustment
    Date
    Fix UV4 Hub Revision adjustment as Hub chip starts with revision 1.
    Incorrectly identifies UV4 as UV4A and UV4A as UV5.

    Fixes 647128f1536ef: x86/platform/uv: Update UV MMRs for UV5

    Signed-off-by: Mike Travis <mike.travis@hpe.com>
    Acked-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
    ---
    arch/x86/kernel/apic/x2apic_uv_x.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
    index 1b98f8c12b96..235f5cde06fc 100644
    --- a/arch/x86/kernel/apic/x2apic_uv_x.c
    +++ b/arch/x86/kernel/apic/x2apic_uv_x.c
    @@ -161,7 +161,7 @@ static int __init early_set_hub_type(void)
    /* UV4/4A only have a revision difference */
    case UV4_HUB_PART_NUMBER:
    uv_min_hub_revision_id = node_id.s.revision
    - + UV4_HUB_REVISION_BASE;
    + + UV4_HUB_REVISION_BASE - 1;
    uv_hub_type_set(UV4);
    if (uv_min_hub_revision_id == UV4A_HUB_REVISION_BASE)
    uv_hub_type_set(UV4|UV4A);
    --
    2.21.0
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