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| author | Kumar Gala <galak@kernel.crashing.org> | 2009-05-08 12:08:20 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-05-15 16:43:41 +1000 |
| commit | 31207dab7d2e63795eb15823947bd2f7025b08e2 (patch) | |
| tree | 84607395d7d74e56e32c5155ecec7efee0d90c12 /arch/powerpc/sysdev | |
| parent | e5fc948b11a9d0aee1cabe7c82726bc36d496875 (diff) | |
| download | lwn-31207dab7d2e63795eb15823947bd2f7025b08e2.tar.gz lwn-31207dab7d2e63795eb15823947bd2f7025b08e2.zip | |
powerpc/mpic: Fix incorrect allocation of interrupt rev-map
Before when we were setting up the irq host map for mpic we passed in
just isu_size for the size of the linear map. However, for a number of
mpic implementations we have no isu (thus pass in 0) and will end up
with a no linear map (size = 0). This causes us to always call
irq_find_mapping() from mpic_get_irq().
By moving the allocation of the host map to after we've determined the
number of sources we can actually benefit from having a linear map for
the non-isu users that covers all the interrupt sources.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/mpic.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c index 21b956701596..0efc12d1a3d7 100644 --- a/arch/powerpc/sysdev/mpic.c +++ b/arch/powerpc/sysdev/mpic.c @@ -1057,13 +1057,6 @@ struct mpic * __init mpic_alloc(struct device_node *node, memset(mpic, 0, sizeof(struct mpic)); mpic->name = name; - mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR, - isu_size, &mpic_host_ops, - flags & MPIC_LARGE_VECTORS ? 2048 : 256); - if (mpic->irqhost == NULL) - return NULL; - - mpic->irqhost->host_data = mpic; mpic->hc_irq = mpic_irq_chip; mpic->hc_irq.typename = name; if (flags & MPIC_PRIMARY) @@ -1213,6 +1206,15 @@ struct mpic * __init mpic_alloc(struct device_node *node, mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1); mpic->isu_mask = (1 << mpic->isu_shift) - 1; + mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR, + isu_size ? isu_size : mpic->num_sources, + &mpic_host_ops, + flags & MPIC_LARGE_VECTORS ? 2048 : 256); + if (mpic->irqhost == NULL) + return NULL; + + mpic->irqhost->host_data = mpic; + /* Display version */ switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) { case 1: |