genirq: Move field 'msi_desc' from irq_data into irq_common_data

MSI descriptors are per-irq instead of per irqchip, so move it into
struct irq_common_data.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/1433145945-789-35-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/linux/irq.h

@@ -132,6 +132,7 @@ struct irq_domain;
  * @node:		node index useful for balancing
  * @handler_data:	per-IRQ data for the irq_chip methods
  * @affinity:		IRQ affinity on SMP
+ * @msi_desc:		MSI descriptor
  */
 struct irq_common_data {
 	unsigned int		state_use_accessors;
@@ -139,6 +140,7 @@ struct irq_common_data {
 	unsigned int		node;
 #endif
 	void			*handler_data;
+	struct msi_desc		*msi_desc;
 	cpumask_var_t		affinity;
 };
 
@@ -155,7 +157,6 @@ struct irq_common_data {
  *			irq_domain
  * @chip_data:		platform-specific per-chip private data for the chip
  *			methods, to allow shared chip implementations
- * @msi_desc:		MSI descriptor
  */
 struct irq_data {
 	u32			mask;
@@ -168,7 +169,6 @@ struct irq_data {
 	struct irq_data		*parent_data;
 #endif
 	void			*chip_data;
-	struct msi_desc		*msi_desc;
 };
 
 /*
@@ -652,12 +652,12 @@ static inline void *irq_data_get_irq_handler_data(struct irq_data *d)
 static inline struct msi_desc *irq_get_msi_desc(unsigned int irq)
 {
 	struct irq_data *d = irq_get_irq_data(irq);
-	return d ? d->msi_desc : NULL;
+	return d ? d->common->msi_desc : NULL;
 }
 
 static inline struct msi_desc *irq_data_get_msi_desc(struct irq_data *d)
 {
-	return d->msi_desc;
+	return d->common->msi_desc;
 }
 
 static inline u32 irq_get_trigger_type(unsigned int irq)

include/linux/irqdesc.h

@@ -128,7 +128,7 @@ static inline void *irq_desc_get_handler_data(struct irq_desc *desc)
 
 static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc)
 {
-	return desc->irq_data.msi_desc;
+	return desc->irq_common_data.msi_desc;
 }
 
 /*

kernel/irq/chip.c

@@ -105,7 +105,7 @@ int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
 
 	if (!desc)
 		return -EINVAL;
-	desc->irq_data.msi_desc = entry;
+	desc->irq_common_data.msi_desc = entry;
 	if (entry && !irq_offset)
 		entry->irq = irq_base;
 	irq_put_desc_unlock(desc, flags);

kernel/irq/irqdesc.c

@@ -74,12 +74,12 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
 	int cpu;
 
 	desc->irq_common_data.handler_data = NULL;
+	desc->irq_common_data.msi_desc = NULL;
 
 	desc->irq_data.common = &desc->irq_common_data;
 	desc->irq_data.irq = irq;
 	desc->irq_data.chip = &no_irq_chip;
 	desc->irq_data.chip_data = NULL;
-	desc->irq_data.msi_desc = NULL;
 	irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
 	irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
 	desc->handle_irq = handle_bad_irq;