iommu/amd: Use helpers to access irq_cfg data structure associated with IRQ

Use helpers to access irq_cfg data structure associated with IRQ,
instead of accessing irq_data->chip_data directly. Later we can
rewrite those helpers to support hierarchy irqdomain.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: iommu@lists.linux-foundation.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Joerg Roedel <joro@8bytes.org>
Link: http://lkml.kernel.org/r/1414397531-28254-20-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/iommu/amd_iommu.c

@@ -4069,7 +4069,7 @@ static int setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry,
 	int devid;
 	int ret;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return -EINVAL;
 
@@ -4132,7 +4132,7 @@ static int set_affinity(struct irq_data *data, const struct cpumask *mask,
 	if (!config_enabled(CONFIG_SMP))
 		return -1;
 
-	cfg       = data->chip_data;
+	cfg       = irqd_cfg(data);
 	irq       = data->irq;
 	irte_info = &cfg->irq_2_irte;
 
@@ -4170,7 +4170,7 @@ static int free_irq(int irq)
 	struct irq_2_irte *irte_info;
 	struct irq_cfg *cfg;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return -EINVAL;
 
@@ -4189,7 +4189,7 @@ static void compose_msi_msg(struct pci_dev *pdev,
 	struct irq_cfg *cfg;
 	union irte irte;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return;
 
@@ -4218,7 +4218,7 @@ static int msi_alloc_irq(struct pci_dev *pdev, int irq, int nvec)
 	if (!pdev)
 		return -EINVAL;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return -EINVAL;
 
@@ -4238,7 +4238,7 @@ static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
 	if (!pdev)
 		return -EINVAL;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return -EINVAL;
 
@@ -4261,7 +4261,7 @@ static int alloc_hpet_msi(unsigned int irq, unsigned int id)
 	struct irq_cfg *cfg;
 	int index, devid;
 
-	cfg = irq_get_chip_data(irq);
+	cfg = irq_cfg(irq);
 	if (!cfg)
 		return -EINVAL;