Subject: Re: [PATCH 3/6] irqchip/gic-v3-its: Add fsl_mc device plumbing to the msi-parent handling

From: Thomas Gleixner <[email-masked]>
Date: Sun, 22 Feb 2026 23:57:44 +0100

On Wed, Feb 18 2026 at 13:52, Marc Zyngier wrote:
> Make the ITS code aware of fsl_mc devices by plumbing the devid
> retrieval primitive.
>
> Signed-off-by: Marc Zyngier <[email-masked]>
> ---
>  drivers/irqchip/irq-gic-its-msi-parent.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/irqchip/irq-gic-its-msi-parent.c b/drivers/irqchip/irq-gic-its-msi-parent.c
> index 12f45228c8674..532c0d626ca04 100644
> --- a/drivers/irqchip/irq-gic-its-msi-parent.c
> +++ b/drivers/irqchip/irq-gic-its-msi-parent.c
> @@ -7,6 +7,7 @@
>  #include <linux/acpi_iort.h>
>  #include <linux/of_address.h>
>  #include <linux/pci.h>
> +#include <linux/fsl/mc.h>
>  
>  #include "irq-gic-its-msi-parent.h"
>  #include <linux/irqchip/irq-msi-lib.h>
> @@ -186,9 +187,11 @@ static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
>  {
>  	struct msi_domain_info *msi_info;
>  	u32 dev_id;
> -	int ret;
> +	int ret = 0;
>  
> -	if (dev->of_node)
> +	if (dev_is_fsl_mc(dev))
> +		dev_id = fsl_mc_get_msi_id(dev);
> +	else if (dev->of_node)
>  		ret = of_pmsi_get_msi_info(domain->parent, dev, &dev_id, NULL);
>  	else
>  		ret = iort_pmsi_get_dev_id(dev, &dev_id);

This rejects as you are building against an unmerged change (I assume
it's Lorenzos GIC5 stuff). I can fix it up when applying.

Thanks,

        tglx