linux-kernel - Re: [PATCH v2 3/9] PCI: Drop pci_is_thunderbolt

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Message-ID: <4747b7b8-ea48-4117-f746-a18dae97bc2@linux.intel.com>
Date:   Mon, 6 Nov 2023 14:33:40 +0200 (EET)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Mario Limonciello <mario.limonciello@....com>
cc:     Karol Herbst <kherbst@...hat.com>, Lyude Paul <lyude@...hat.com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>,
        Danilo Krummrich <dakr@...hat.com>,
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        Xinhui Pan <Xinhui.Pan@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Mark Gross <markgross@...nel.org>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Pali Rohár <pali@...nel.org>,
        Marek Behún <kabel@...nel.org>,
        "Maciej W . Rozycki" <macro@...am.me.uk>,
        Manivannan Sadhasivam <mani@...nel.org>,
        "open list:DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS" 
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        <amd-gfx@...ts.freedesktop.org>,
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        <platform-driver-x86@...r.kernel.org>,
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Subject: Re: [PATCH v2 3/9] PCI: Drop pci_is_thunderbolt_attached()

On Fri, 3 Nov 2023, Mario Limonciello wrote:

> All callers have switched to dev_is_removable() for detecting
> hotpluggable PCIe devices.
> 
> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> ---
>  include/linux/pci.h | 22 ----------------------
>  1 file changed, 22 deletions(-)
> 
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index b56417276042..530b0a360514 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -2616,28 +2616,6 @@ static inline bool pci_ari_enabled(struct pci_bus *bus)
>  	return bus->self && bus->self->ari_enabled;
>  }
>  
> -/**
> - * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
> - * @pdev: PCI device to check
> - *
> - * Walk upwards from @pdev and check for each encountered bridge if it's part
> - * of a Thunderbolt controller.  Reaching the host bridge means @pdev is not
> - * Thunderbolt-attached.  (But rather soldered to the mainboard usually.)
> - */
> -static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
> -{
> -	struct pci_dev *parent = pdev;
> -
> -	if (pdev->is_thunderbolt)
> -		return true;
> -
> -	while ((parent = pci_upstream_bridge(parent)))
> -		if (parent->is_thunderbolt)
> -			return true;
> -
> -	return false;
> -}
> -
>  #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
>  void pci_uevent_ers(struct pci_dev *pdev, enum  pci_ers_result err_type);
>  #endif
> 

I don't think all callers have been removed. Ah, lkp has caught the same 
problem.

-- 
 i.