Hello!
On 12/24/21 4:12 PM, Lad Prabhakar wrote:
> 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@xxxxxxxxxxxxxx>
> ---
> v2-->v3
> * New patch
> ---
> drivers/ata/pata_of_platform.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
> index 35aa158fc976..2e2ec7d77726 100644
> --- a/drivers/ata/pata_of_platform.c
> +++ b/drivers/ata/pata_of_platform.c
> @@ -25,11 +25,12 @@ static int pata_of_platform_probe(struct platform_device *ofdev)
> struct device_node *dn = ofdev->dev.of_node;
> struct resource io_res;
> struct resource ctl_res;
> - struct resource *irq_res;
> + struct resource irq_res;
> unsigned int reg_shift = 0;
> int pio_mode = 0;
> int pio_mask;
> bool use16bit;
> + int irq;
>
> ret = of_address_to_resource(dn, 0, &io_res);
> if (ret) {
> @@ -45,7 +46,14 @@ static int pata_of_platform_probe(struct platform_device *ofdev)
> return -EINVAL;
> }
>
> - irq_res = platform_get_resource(ofdev, IORESOURCE_IRQ, 0);
> + irq = platform_get_irq_optional(ofdev, 0);
> + if (irq < 0 && irq != -ENXIO)
> + return irq;
> +
> + if (irq > 0) {
> + memset(&irq_res, 0x0, sizeof(struct resource));
> + irq_res.start = irq;
Is that really enough? Doesn't __pata_platform_probe() use irq_res->flags?
[...]
MBR, Sergey
