linux-kernel - Re: [PATCH] um: virt-pci: implement pcibios_get_phb_of

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Date:   Fri, 20 Jan 2023 09:22:56 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc:     linux-um@...ts.infradead.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...s.com
Subject: Re: [PATCH] um: virt-pci: implement pcibios_get_phb_of_node()

On Fri, 2023-01-20 at 09:02 +0100, Vincent Whitchurch wrote:
> Implement pcibios_get_phb_of_node() as x86 does in order to allow PCI
> busses to be associated with devicetree nodes.
> 
> Signed-off-by: Vincent Whitchurch <vincent.whitchurch@...s.com>
> ---
>  arch/um/drivers/virt-pci.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/arch/um/drivers/virt-pci.c b/arch/um/drivers/virt-pci.c
> index 3ac220dafec4..6884e1be38e4 100644
> --- a/arch/um/drivers/virt-pci.c
> +++ b/arch/um/drivers/virt-pci.c
> @@ -533,6 +533,25 @@ static void um_pci_irq_vq_cb(struct virtqueue *vq)
>  	}
>  }
>  
> +/* Copied from arch/x86/kernel/devicetree.c */
> +struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)

Hah. I was going to ask how that works without any ifdef or anything,
but then I found the __weak version :-)

Acked-by: Johannes Berg <johannes@...solutions.net>


Or maybe I should finally put on my tentative ARCH=um maintainer hat and
start taking patches :)

johannes