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SubjectRe: [PATCH] pci/aspm: Remove CONFIG_PCIEASPM_DEBUG
On 2018-05-09 00:01, Rajat Jain wrote:
> Currently, the linux kernel disables ASPM when a device is
> removed from the kernel. But it is not enabled again when
> a new device is added on that slot even if it was originally
> enabled (by the BIOS) when the system booted up (assuming
> POLICY_DEFAULT).
>
> This was earlier discussed here:
> https://www.spinics.net/lists/linux-pci/msg60212.html
>
> And some suggestions from Bjorn here:
> https://www.spinics.net/lists/linux-pci/msg60541.html
>
> This patch picks up one of the suggestion, to remove the
> CONFIG_PCIEASPM_DEBUG and thus make the code always
> avilable. This provides control to userspace to control
> ASPM on a per slot / device basis using sysfs interface.
>
> Signed-off-by: Rajat Jain <rajatja@google.com>

Reviewed-by: Sinan Kaya <okaya@codeaurora.org>


> ---
> drivers/pci/pci.h | 5 -----
> drivers/pci/pcie/Kconfig | 8 --------
> drivers/pci/pcie/aspm.c | 2 --
> 3 files changed, 15 deletions(-)
>
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 023f7cf25bff..383d92a6b0fb 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -365,13 +365,8 @@ static inline void
> pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
> static inline void pcie_aspm_powersave_config_link(struct pci_dev
> *pdev) { }
> #endif
>
> -#ifdef CONFIG_PCIEASPM_DEBUG
> void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
> void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
> -#else
> -static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev
> *pdev) { }
> -static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev
> *pdev) { }
> -#endif
>
> #ifdef CONFIG_PCIE_PTM
> void pci_ptm_init(struct pci_dev *dev);
> diff --git a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig
> index b12e28b3d8f9..089b9f559d88 100644
> --- a/drivers/pci/pcie/Kconfig
> +++ b/drivers/pci/pcie/Kconfig
> @@ -46,14 +46,6 @@ config PCIEASPM
>
> When in doubt, say Y.
>
> -config PCIEASPM_DEBUG
> - bool "Debug PCI Express ASPM"
> - depends on PCIEASPM
> - default n
> - help
> - This enables PCI Express ASPM debug support. It will add per-device
> - interface to control ASPM.
> -
> choice
> prompt "Default ASPM policy"
> default PCIEASPM_DEFAULT
> diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
> index c687c817b47d..8ffc13d42baa 100644
> --- a/drivers/pci/pcie/aspm.c
> +++ b/drivers/pci/pcie/aspm.c
> @@ -1161,7 +1161,6 @@ static int pcie_aspm_get_policy(char *buffer,
> const struct kernel_param *kp)
> module_param_call(policy, pcie_aspm_set_policy, pcie_aspm_get_policy,
> NULL, 0644);
>
> -#ifdef CONFIG_PCIEASPM_DEBUG
> static ssize_t link_state_show(struct device *dev,
> struct device_attribute *attr,
> char *buf)
> @@ -1264,7 +1263,6 @@ void pcie_aspm_remove_sysfs_dev_files(struct
> pci_dev *pdev)
> sysfs_remove_file_from_group(&pdev->dev.kobj,
> &dev_attr_clk_ctl.attr, power_group);
> }
> -#endif
>
> static int __init pcie_aspm_disable(char *str)
> {

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