linux-kernel - Re: [PATCH v2 3/3] PCI/DPC: Encapsulate pci_acpi_add_edr

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Message-ID: <572af7f6-2544-4708-a90d-e18c58eb2762@linux.intel.com>
Date: Sun, 25 Feb 2024 12:06:52 -0800
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: Bjorn Helgaas <helgaas@...nel.org>, linux-pci@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Matthew W Carlis <mattc@...estorage.com>,
 Keith Busch <kbusch@...nel.org>, Lukas Wunner <lukas@...ner.de>,
 Mika Westerberg <mika.westerberg@...ux.intel.com>,
 Jesse Brandeburg <jesse.brandeburg@...el.com>,
 Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v2 3/3] PCI/DPC: Encapsulate pci_acpi_add_edr_notifier()


On 2/22/24 2:15 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
>
> pci_acpi_add_edr_notifier() and pci_acpi_remove_edr_notifier() are only
> referenced inside drivers/pci/.  Move their declarations from
> include/linux/pci-acpi.h to drivers/pci/pci.h so they're not visible
> outside drivers/pci/.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
> ---
>  drivers/pci/pci.h        | 4 ++++
>  include/linux/pci-acpi.h | 8 --------
>  2 files changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 2336a8d1edab..03bf2776d73b 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -432,11 +432,15 @@ void pci_dpc_init(struct pci_dev *pdev);
>  void dpc_process_error(struct pci_dev *pdev);
>  pci_ers_result_t dpc_reset_link(struct pci_dev *pdev);
>  bool pci_dpc_recovered(struct pci_dev *pdev);
> +void pci_acpi_add_edr_notifier(struct pci_dev *pdev);
> +void pci_acpi_remove_edr_notifier(struct pci_dev *pdev);

Protect them with CONFIG_ACPI?

>  #else
>  static inline void pci_save_dpc_state(struct pci_dev *dev) { }
>  static inline void pci_restore_dpc_state(struct pci_dev *dev) { }
>  static inline void pci_dpc_init(struct pci_dev *pdev) { }
>  static inline bool pci_dpc_recovered(struct pci_dev *pdev) { return false; }
> +static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
> +static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { }
>  #endif
>  
>  #ifdef CONFIG_PCIEPORTBUS
> diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
> index 92e196ba0249..f447ce215adf 100644
> --- a/include/linux/pci-acpi.h
> +++ b/include/linux/pci-acpi.h
> @@ -122,14 +122,6 @@ extern const guid_t pci_acpi_dsm_guid;
>  #define DSM_PCI_POWER_ON_RESET_DELAY		0x08
>  #define DSM_PCI_DEVICE_READINESS_DURATIONS	0x09
>  
> -#ifdef CONFIG_PCIE_DPC
> -void pci_acpi_add_edr_notifier(struct pci_dev *pdev);
> -void pci_acpi_remove_edr_notifier(struct pci_dev *pdev);
> -#else
> -static inline void pci_acpi_add_edr_notifier(struct pci_dev *pdev) { }
> -static inline void pci_acpi_remove_edr_notifier(struct pci_dev *pdev) { }
> -#endif /* CONFIG_PCIE_DPC */
> -
>  int pci_acpi_set_companion_lookup_hook(struct acpi_device *(*func)(struct pci_dev *));
>  void pci_acpi_clear_companion_lookup_hook(void);
>  

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer