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| author | Will Deacon <will.deacon@arm.com> | 2011-11-25 19:23:36 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-11-26 21:58:55 +0000 |
| commit | fe41db7b3aca512e19b8ef4fbd5ad55545005d25 (patch) | |
| tree | c48f6e939edb9140484d511c42dba65487dc92b2 /arch/arm | |
| parent | abdd7b91dab2f8b2e32e90e4b7e809ffb462a662 (diff) | |
| download | linux-fe41db7b3aca512e19b8ef4fbd5ad55545005d25.tar.gz linux-fe41db7b3aca512e19b8ef4fbd5ad55545005d25.tar.bz2 linux-fe41db7b3aca512e19b8ef4fbd5ad55545005d25.zip | |
ARM: 7177/1: GIC: avoid skipping non-existent PPIs in irq_start calculation
Commit 4294f8baa ("ARM: gic: add irq_domain support") defines irq_start
as irq_start = (irq_start & ~31) + 16; On a platform with a GIC and a
CPU without PPIs, this results in irq_start being off by 16.
This patch fixes gic_init so that we only carve out a PPI space when
PPIs exist for the GIC being initialised.
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/common/gic.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index 43240f315dea..410a546060a2 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -582,13 +582,16 @@ void __init gic_init(unsigned int gic_nr, int irq_start, * For primary GICs, skip over SGIs. * For secondary GICs, skip over PPIs, too. */ + domain->hwirq_base = 32; if (gic_nr == 0) { gic_cpu_base_addr = cpu_base; - domain->hwirq_base = 16; - if (irq_start > 0) - irq_start = (irq_start & ~31) + 16; - } else - domain->hwirq_base = 32; + + if ((irq_start & 31) > 0) { + domain->hwirq_base = 16; + if (irq_start != -1) + irq_start = (irq_start & ~31) + 16; + } + } /* * Find out how many interrupts are supported. |