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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-22 13:50:13 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-27 11:33:58 +1100 |
| commit | fe83364f0bf11fcb20cecbe944a95834632ffffb (patch) | |
| tree | 5596915cd3980617166522aabcd7d5f8b71b5c49 /arch/powerpc/sysdev/mpic.c | |
| parent | f851013cb2238a82782da03ac82a14447933f90d (diff) | |
| download | linux-fe83364f0bf11fcb20cecbe944a95834632ffffb.tar.gz linux-fe83364f0bf11fcb20cecbe944a95834632ffffb.tar.bz2 linux-fe83364f0bf11fcb20cecbe944a95834632ffffb.zip | |
powerpc/mpic: Fix allocation of reverse-map for multi-ISU mpics
When using a multi-ISU MPIC, we can interrupts up to
isu_size * MPIC_MAX_ISU, not just isu_size, so allocate
the right size reverse map.
Without this, the code will constantly fallback to
a linear search.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/mpic.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index b9b989d305dd..16eb743b38a7 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1331,9 +1331,13 @@ struct mpic * __init mpic_alloc(struct device_node *node, /* * By default, the last source number comes from the MPIC, but the * device-tree and board support code can override it on buggy hw. + * If we get passed an isu_size (multi-isu MPIC) then we use that + * as a default instead of the value read from the HW. */ last_irq = (greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK) - >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT; + >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT; + if (isu_size) + last_irq = isu_size * MPIC_MAX_ISU - 1; of_property_read_u32(mpic->node, "last-interrupt-source", &last_irq); if (irq_count) last_irq = irq_count - 1; @@ -1352,7 +1356,7 @@ struct mpic * __init mpic_alloc(struct device_node *node, mpic->isu_mask = (1 << mpic->isu_shift) - 1; mpic->irqhost = irq_alloc_host(mpic->node, IRQ_HOST_MAP_LINEAR, - mpic->isu_size, &mpic_host_ops, + last_irq + 1, &mpic_host_ops, intvec_top + 1); /* |