Commit-ID: f0c450eaa364cb77c778f2a46ee2aa3ff464b332
Gitweb: http://git.kernel.org/tip/f0c450eaa364cb77c778f2a46ee2aa3ff464b332
Author: Sebastian Frias <sf84@xxxxxxxxxxx>
AuthorDate: Mon, 1 Aug 2016 16:27:53 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Fri, 2 Sep 2016 18:06:49 +0200
genirq/generic_chip: Get rid of code duplication
irq_map_generic_chip() contains about the same code as
irq_get_domain_generic_chip() except for the return values.
Split out the irq_get_domain_generic_chip() implementation so it can be
reused.
[ tglx: Removed the extra churn in irq_get_domain_generic_chip() callers
and massaged changelog ]
Signed-off-by: Sebastian Frias <sf84@xxxxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Mason <slash.tmp@xxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/579F5C69.8070006@xxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
kernel/irq/generic-chip.c | 34 +++++++++++++++++++---------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index 5fbb94b..11ad73b 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -328,6 +328,20 @@ int irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
}
EXPORT_SYMBOL_GPL(irq_alloc_domain_generic_chips);
+static struct irq_chip_generic *
+__irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq)
+{
+ struct irq_domain_chip_generic *dgc = d->gc;
+ int idx;
+
+ if (!dgc)
+ return ERR_PTR(-ENODEV);
+ idx = hw_irq / dgc->irqs_per_chip;
+ if (idx >= dgc->num_chips)
+ return ERR_PTR(-EINVAL);
+ return dgc->gc[idx];
+}
+
/**
* irq_get_domain_generic_chip - Get a pointer to the generic chip of a hw_irq
* @d: irq domain pointer
@@ -336,15 +350,9 @@ EXPORT_SYMBOL_GPL(irq_alloc_domain_generic_chips);
struct irq_chip_generic *
irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq)
{
- struct irq_domain_chip_generic *dgc = d->gc;
- int idx;
+ struct irq_chip_generic *gc = __irq_get_domain_generic_chip(d, hw_irq);
- if (!dgc)
- return NULL;
- idx = hw_irq / dgc->irqs_per_chip;
- if (idx >= dgc->num_chips)
- return NULL;
- return dgc->gc[idx];
+ return !IS_ERR(gc) ? gc : NULL;
}
EXPORT_SYMBOL_GPL(irq_get_domain_generic_chip);
@@ -368,13 +376,9 @@ int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
unsigned long flags;
int idx;
- if (!d->gc)
- return -ENODEV;
-
- idx = hw_irq / dgc->irqs_per_chip;
- if (idx >= dgc->num_chips)
- return -EINVAL;
- gc = dgc->gc[idx];
+ gc = __irq_get_domain_generic_chip(d, hw_irq);
+ if (IS_ERR(gc))
+ return PTR_ERR(gc);
idx = hw_irq % dgc->irqs_per_chip;
--
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