genirq: Sanitize irq_data accessors
Get the data structure from the core and provide inline wrappers to
access the irq_data members.
Provide accessor inlines for irq_data as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/irq.h b/include/linux/irq.h
index e7e7ac8..bea4055 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -85,6 +85,7 @@
#endif
struct msi_desc;
+struct irq_2_iommu;
/**
* struct irq_data - per irq and irq chip data passed down to chip functions
@@ -332,11 +333,64 @@
extern int set_irq_chip_data(unsigned int irq, void *data);
extern int set_irq_type(unsigned int irq, unsigned int type);
extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
+extern struct irq_data *irq_get_irq_data(unsigned int irq);
-#define get_irq_chip(irq) (irq_to_desc(irq)->irq_data.chip)
-#define get_irq_chip_data(irq) (irq_to_desc(irq)->irq_data.chip_data)
-#define get_irq_data(irq) (irq_to_desc(irq)->irq_data.handler_data)
-#define get_irq_msi(irq) (irq_to_desc(irq)->irq_data.msi_desc)
+static inline struct irq_chip *get_irq_chip(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->chip : NULL;
+}
+
+static inline struct irq_chip *irq_data_get_irq_chip(struct irq_data *d)
+{
+ return d->chip;
+}
+
+static inline void *get_irq_chip_data(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->chip_data : NULL;
+}
+
+static inline void *irq_data_get_irq_chip_data(struct irq_data *d)
+{
+ return d->chip_data;
+}
+
+static inline void *get_irq_data(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->handler_data : NULL;
+}
+
+static inline void *irq_data_get_irq_data(struct irq_data *d)
+{
+ return d->handler_data;
+}
+
+static inline struct msi_desc *get_irq_msi(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->msi_desc : NULL;
+}
+
+static inline struct msi_desc *irq_data_get_msi(struct irq_data *d)
+{
+ return d->msi_desc;
+}
+
+#ifdef CONFIG_INTR_REMAP
+static inline struct irq_2_iommu *get_irq_iommu(unsigned int irq)
+{
+ struct irq_data *d = irq_get_irq_data(irq);
+ return d ? d->irq_2_iommu : NULL;
+}
+
+static inline struct irq_2_iommu *irq_data_get_iommu(struct irq_data *d)
+{
+ return d->irq_2_iommu;
+}
+#endif
#endif /* CONFIG_GENERIC_HARDIRQS */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 2b1f690..659be32 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -256,6 +256,14 @@
}
EXPORT_SYMBOL(set_irq_chip_data);
+struct irq_data *irq_get_irq_data(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ return desc ? &desc->irq_data : NULL;
+}
+EXPORT_SYMBOL_GPL(irq_get_irq_data);
+
/**
* set_irq_nested_thread - Set/Reset the IRQ_NESTED_THREAD flag of an irq
*