lkml.org 
[lkml]   [2018]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:x86/platform] x86/devicetree: Fix device IRQ settings in DT
Commit-ID:  0a5169add90e43ab45ab1ba34223b8583fcaf675
Gitweb: https://git.kernel.org/tip/0a5169add90e43ab45ab1ba34223b8583fcaf675
Author: Ivan Gorinov <ivan.gorinov@intel.com>
AuthorDate: Wed, 7 Mar 2018 11:46:53 -0800
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 8 Mar 2018 09:59:53 +0100

x86/devicetree: Fix device IRQ settings in DT

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: 11e4438ee330 ("irqdomain: Introduce a firmware-specific IRQ specifier structure")
Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
Signed-off-by: Thomas 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.com

---
arch/x86/kernel/devicetree.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 63d2ebc21825..5cd387fcc777 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -195,19 +195,22 @@ 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);
}
\
 
 \ /
  Last update: 2018-03-08 10:04    [W:0.082 / U:55.132 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site