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authorLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>2021-12-24 14:29:07 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-30 13:26:48 +0100
commit257538544d42987e740491838519ceee5e97d04e (patch)
tree1c5e1ea2dae5d0e0be01136aefb130aa68999f9a /drivers/tty
parenta359101c7c6404d917a19d52133305ea284a0197 (diff)
serial: altera: Use platform_get_irq_optional() to get the interrupt
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> Link: https://lore.kernel.org/r/20211224142917.6966-2-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/altera_uart.c9
1 files changed, 5 insertions, 4 deletions
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;