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    Subject[PATCH 5.4 065/135] genirq/irqdomain: Make sure all irq domain flags are distinct
    Date
    From: Zenghui Yu <yuzenghui@huawei.com>

    commit 2546287c5fb363a0165933ae2181c92f03e701d0 upstream.

    This was noticed when printing debugfs for MSIs on my ARM64 server. The
    new dstate IRQD_MSI_NOMASK_QUIRK came out surprisingly while it should only
    be the x86 stuff for the time being...

    The new MSI quirk flag uses the same bit as IRQ_DOMAIN_NAME_ALLOCATED which
    is oddly defined as bit 6 for no good reason.

    Switch it to the non used bit 1.

    Fixes: 6f1a4891a592 ("x86/apic/msi: Plug non-maskable MSI affinity race")
    Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Cc: stable@vger.kernel.org
    Link: https://lkml.kernel.org/r/20200221020725.2038-1-yuzenghui@huawei.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    include/linux/irqdomain.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/include/linux/irqdomain.h
    +++ b/include/linux/irqdomain.h
    @@ -191,7 +191,7 @@ enum {
    IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0),

    /* Irq domain name was allocated in __irq_domain_add() */
    - IRQ_DOMAIN_NAME_ALLOCATED = (1 << 6),
    + IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1),

    /* Irq domain is an IPI domain with virq per cpu */
    IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2),

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