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authorKumar Gala <galak@kernel.crashing.org>2009-05-08 08:08:20 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-05-15 02:43:41 -0400
commit31207dab7d2e63795eb15823947bd2f7025b08e2 (patch)
tree84607395d7d74e56e32c5155ecec7efee0d90c12 /arch/powerpc/sysdev/mpic.c
parente5fc948b11a9d0aee1cabe7c82726bc36d496875 (diff)
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/mpic.c')
-rw-r--r--arch/powerpc/sysdev/mpic.c16
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,
1057 memset(mpic, 0, sizeof(struct mpic)); 1057 memset(mpic, 0, sizeof(struct mpic));
1058 mpic->name = name; 1058 mpic->name = name;
1059 1059
1060 mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
1061 isu_size, &mpic_host_ops,
1062 flags & MPIC_LARGE_VECTORS ? 2048 : 256);
1063 if (mpic->irqhost == NULL)
1064 return NULL;
1065
1066 mpic->irqhost->host_data = mpic;
1067 mpic->hc_irq = mpic_irq_chip; 1060 mpic->hc_irq = mpic_irq_chip;
1068 mpic->hc_irq.typename = name; 1061 mpic->hc_irq.typename = name;
1069 if (flags & MPIC_PRIMARY) 1062 if (flags & MPIC_PRIMARY)
@@ -1213,6 +1206,15 @@ struct mpic * __init mpic_alloc(struct device_node *node,
1213 mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1); 1206 mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1);
1214 mpic->isu_mask = (1 << mpic->isu_shift) - 1; 1207 mpic->isu_mask = (1 << mpic->isu_shift) - 1;
1215 1208
1209 mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
1210 isu_size ? isu_size : mpic->num_sources,
1211 &mpic_host_ops,
1212 flags & MPIC_LARGE_VECTORS ? 2048 : 256);
1213 if (mpic->irqhost == NULL)
1214 return NULL;
1215
1216 mpic->irqhost->host_data = mpic;
1217
1216 /* Display version */ 1218 /* Display version */
1217 switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) { 1219 switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) {
1218 case 1: 1220 case 1: