• Grant Likely's avatar
    powerpc/irqdomain: Fix broken NR_IRQ references · 4013369f
    Grant Likely authored
    The switch from using irq_map to irq_alloc_desc*() for managing irq
    number allocations introduced new bugs in some of the powerpc
    interrupt code.  Several functions rely on the value of NR_IRQS to
    determine the maximum irq number that could get allocated.  However,
    with sparse_irq and using irq_alloc_desc*() the maximum possible irq
    number is now specified with 'nr_irqs' which may be a number larger
    than NR_IRQS.  This has caused breakage on powermac when
    CONFIG_NR_IRQS is set to 32.
    This patch removes most of the direct references to NR_IRQS in the
    powerpc code and replaces them with either a nr_irqs reference or by
    using the common for_each_irq_desc() macro.  The powerpc-specific
    for_each_irq() macro is removed at the same time.
    Also, the Cell axon_msi driver is refactored to remove the global
    build assumption on the size of NR_IRQS and instead add a limit to the
    maximum irq number when calling irq_domain_add_nomap().
    Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
axon_msi.c 11.6 KB