irqchip: intc-irqpin: Cache mapped IRQ

Cache IRQ in domain_irq variable instead of
making use of irq_find_mapping(). While at it
rename the irq variable to requested_irq.

Signed-off-by: Magnus Damm <damm@opensource.se>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 16 insertions, 14 deletions

diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c
index 4b5933fc0e3d..0ac2bf683378 100644
--- a/drivers/irqchip/irq-renesas-intc-irqpin.c
+++ b/drivers/irqchip/irq-renesas-intc-irqpin.c
@@ -61,7 +61,8 @@ struct intc_irqpin_iomem {
 
 struct intc_irqpin_irq {
         int hw_irq;
-        int irq;
+        int requested_irq;
+        int domain_irq;
         struct intc_irqpin_priv *p;
 };
 
@@ -171,8 +172,7 @@ static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value)
 static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str)
 {
         dev_dbg(&i->p->pdev->dev, "%s (%d:%d:%d)\n",
-                str, i->irq, i->hw_irq,
-                irq_find_mapping(i->p->irq_domain, i->hw_irq));
+                str, i->requested_irq, i->hw_irq, i->domain_irq);
 }
 
 static void intc_irqpin_irq_enable(struct irq_data *d)
@@ -196,7 +196,7 @@ static void intc_irqpin_irq_disable(struct irq_data *d)
 static void intc_irqpin_irq_enable_force(struct irq_data *d)
 {
         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
-        int irq = p->irq[irqd_to_hwirq(d)].irq;
+        int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 
         intc_irqpin_irq_enable(d);
         irq_get_chip(irq)->irq_unmask(irq_get_irq_data(irq));
@@ -205,7 +205,7 @@ static void intc_irqpin_irq_enable_force(struct irq_data *d)
 static void intc_irqpin_irq_disable_force(struct irq_data *d)
 {
         struct intc_irqpin_priv *p = irq_data_get_irq_chip_data(d);
-        int irq = p->irq[irqd_to_hwirq(d)].irq;
+        int irq = p->irq[irqd_to_hwirq(d)].requested_irq;
 
         irq_get_chip(irq)->irq_mask(irq_get_irq_data(irq));
         intc_irqpin_irq_disable(d);
@@ -246,7 +246,7 @@ static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id)
         if (intc_irqpin_read(p, INTC_IRQPIN_REG_SOURCE) & bit) {
                 intc_irqpin_write(p, INTC_IRQPIN_REG_SOURCE, ~bit);
                 intc_irqpin_dbg(i, "demux2");
-                generic_handle_irq(irq_find_mapping(p->irq_domain, i->hw_irq));
+                generic_handle_irq(i->domain_irq);
                 return IRQ_HANDLED;
         }
         return IRQ_NONE;
@@ -257,6 +257,9 @@ static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq,
 {
         struct intc_irqpin_priv *p = h->host_data;
 
+        p->irq[hw].domain_irq = virq;
+        p->irq[hw].hw_irq = hw;
+
         intc_irqpin_dbg(&p->irq[hw], "map");
         irq_set_chip_data(virq, h->host_data);
         irq_set_chip_and_handler(virq, &p->irq_chip, handle_level_irq);
@@ -314,9 +317,8 @@ static int intc_irqpin_probe(struct platform_device *pdev)
                 if (!irq)
                         break;
 
-                p->irq[k].hw_irq = k;
                 p->irq[k].p = p;
-                p->irq[k].irq = irq->start;
+                p->irq[k].requested_irq = irq->start;
         }
 
         p->number_of_irqs = k;
@@ -389,7 +391,8 @@ static int intc_irqpin_probe(struct platform_device *pdev)
 
         /* request and set priority on interrupts one by one */
         for (k = 0; k < p->number_of_irqs; k++) {
-                if (request_irq(p->irq[k].irq, intc_irqpin_irq_handler,
+                if (request_irq(p->irq[k].requested_irq,
+                                intc_irqpin_irq_handler,
                                 0, name, &p->irq[k])) {
                         dev_err(&pdev->dev, "failed to request low IRQ\n");
                         ret = -ENOENT;
@@ -402,17 +405,16 @@ static int intc_irqpin_probe(struct platform_device *pdev)
 
         /* warn in case of mismatch if irq base is specified */
         if (p->config.irq_base) {
-                k = irq_find_mapping(p->irq_domain, 0);
-                if (p->config.irq_base != k)
+                if (p->config.irq_base != p->irq[0].domain_irq)
                         dev_warn(&pdev->dev, "irq base mismatch (%d/%d)\n",
-                                 p->config.irq_base, k);
+                                 p->config.irq_base, p->irq[0].domain_irq);
         }
 
         return 0;
 
 err3:
         for (; k >= 0; k--)
-                free_irq(p->irq[k - 1].irq, &p->irq[k - 1]);
+                free_irq(p->irq[k - 1].requested_irq, &p->irq[k - 1]);
 
         irq_domain_remove(p->irq_domain);
 err2:
@@ -430,7 +432,7 @@ static int intc_irqpin_remove(struct platform_device *pdev)
         int k;
 
         for (k = 0; k < p->number_of_irqs; k++)
-                free_irq(p->irq[k].irq, &p->irq[k]);
+                free_irq(p->irq[k].requested_irq, &p->irq[k]);
 
         irq_domain_remove(p->irq_domain);