Commit 4b35d8f9 authored by Ivan Gorinov's avatar Ivan Gorinov Committed by Khalid Elmously

x86/devicetree: Fix device IRQ settings in DT

BugLink: https://bugs.launchpad.net/bugs/1775771

[ Upstream commit 0a5169ad ]

IRQ parameters for the SoC devices connected directly to I/O APIC lines
(without PCI IRQ routing) may be specified in the Device Tree.

Called from DT IRQ parser, irq_create_fwspec_mapping() calls
irq_domain_alloc_irqs() with a pointer to irq_fwspec structure as @arg.

But x86-specific DT IRQ allocation code casts @arg to of_phandle_args
structure pointer and crashes trying to read the IRQ parameters. The
function was not converted when the mapping descriptor was changed to
irq_fwspec in the generic irqdomain code.

Fixes: 11e4438e ("irqdomain: Introduce a firmware-specific IRQ specifier structure")
Signed-off-by: default avatarIvan Gorinov <ivan.gorinov@intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Link: https://lkml.kernel.org/r/a234dee27ea60ce76141872da0d6bdb378b2a9ee.1520450752.git.ivan.gorinov@intel.comSigned-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarJuerg Haefliger <juergh@canonical.com>
Signed-off-by: default avatarKhalid Elmously <khalid.elmously@canonical.com>
parent fa70dd6c
......@@ -200,19 +200,22 @@ static struct of_ioapic_type of_ioapic_type[] =
static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
struct of_phandle_args *irq_data = (void *)arg;
struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
struct of_ioapic_type *it;
struct irq_alloc_info tmp;
int type_index;
if (WARN_ON(irq_data->args_count < 2))
if (WARN_ON(fwspec->param_count < 2))
return -EINVAL;
if (irq_data->args[1] >= ARRAY_SIZE(of_ioapic_type))
type_index = fwspec->param[1];
if (type_index >= ARRAY_SIZE(of_ioapic_type))
return -EINVAL;
it = &of_ioapic_type[irq_data->args[1]];
it = &of_ioapic_type[type_index];
ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
tmp.ioapic_pin = irq_data->args[0];
tmp.ioapic_pin = fwspec->param[0];
return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
}
......
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