[PATCH v1 2/4] gpio: dwapb: Don't use 0 as valid Linux interrupt number

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

0 is not valid IRQ number in Linux interrupt number space.
Refactor the code with this kept in mind.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Serge Semin <fancer.lancer@xxxxxxxxx>
---
 drivers/gpio/gpio-dwapb.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 5bc5057f071f37..78662d6d73634e 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -417,7 +417,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 		int i;
 
 		for (i = 0; i < pp->ngpio; i++) {
-			if (pp->irq[i] >= 0)
+			if (pp->irq[i])
 				irq_set_chained_handler_and_data(pp->irq[i],
 						dwapb_irq_handler, gpio);
 		}
@@ -531,23 +531,23 @@ static void dwapb_get_irq(struct device *dev, struct fwnode_handle *fwnode,
 			  struct dwapb_port_property *pp)
 {
 	struct device_node *np = NULL;
-	int j;
+	int err, j;
 
 	if (fwnode_property_read_bool(fwnode, "interrupt-controller"))
 		np = to_of_node(fwnode);
 
 	for (j = 0; j < pp->ngpio; j++) {
-		pp->irq[j] = -ENXIO;
-
 		if (np)
-			pp->irq[j] = of_irq_get(np, j);
+			err = of_irq_get(np, j);
 		else if (has_acpi_companion(dev))
-			pp->irq[j] = platform_get_irq_optional(to_platform_device(dev), j);
+			err = platform_get_irq_optional(to_platform_device(dev), j);
+		if (err < 0)
+			continue;
 
-		if (pp->irq[j] >= 0)
-			pp->has_irq = true;
+		pp->irq[j] = err;
 	}
 
+	pp->has_irq = memchr_inv(pp->irq, 0, sizeof(pp->irq)) != NULL;
 	if (!pp->has_irq)
 		dev_warn(dev, "no irq for port%d\n", pp->idx);
 }
-- 
2.26.2