diff mbox series

[01/10] serial: altera: Use platform_get_irq_optional() to get the interrupt

Message ID 20211224142917.6966-2-prabhakar.mahadev-lad.rj@bp.renesas.com
State New
Headers show
Series serial: Use platform_get_irq*() variants to fetch IRQ's | expand

Commit Message

Prabhakar Mahadev Lad Dec. 24, 2021, 2:29 p.m. UTC 
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq_optional().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/tty/serial/altera_uart.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 7c5f4e966b59..64a352b40197 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -553,7 +553,6 @@  static int altera_uart_probe(struct platform_device *pdev)
 	struct altera_uart_platform_uart *platp = dev_get_platdata(&pdev->dev);
 	struct uart_port *port;
 	struct resource *res_mem;
-	struct resource *res_irq;
 	int i = pdev->id;
 	int ret;
 
@@ -577,9 +576,11 @@  static int altera_uart_probe(struct platform_device *pdev)
 	else
 		return -EINVAL;
 
-	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res_irq)
-		port->irq = res_irq->start;
+	ret = platform_get_irq_optional(pdev, 0);
+	if (ret < 0 && ret != -ENXIO)
+		return ret;
+	if (ret > 0)
+		port->irq = ret;
 	else if (platp)
 		port->irq = platp->irq;