If a device has a firmware node (DT/ACPI), and the device is marked
disabled, that is currently ignored. Add a check for this condition
and bail out creating the pci_dev.
This assumes the config space for the device can still be accessed
because they already have by this point in order to identify the device.
Cc: Liu Peibao <[email protected]>
Cc: Binbin Zhou <[email protected]>
Cc: Huacai Chen <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
---
Please test if this works for Loongson.
---
drivers/pci/probe.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 1779582fb500..b1d80c1d7a69 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1841,6 +1841,8 @@ int pci_setup_device(struct pci_dev *dev)
pci_set_of_node(dev);
pci_set_acpi_fwnode(dev);
+ if (dev->dev.fwnode && !fwnode_device_is_available(dev->dev.fwnode))
+ return -ENODEV;
pci_dev_assign_slot(dev);
--
2.39.1
> -----原始邮件-----
> 发件人: "Rob Herring" <[email protected]>
> 发送时间:2023-02-11 00:43:51 (星期六)
> 收件人: "Bjorn Helgaas" <[email protected]>
> 抄送: "Liu Peibao" <[email protected]>, "Binbin Zhou" <[email protected]>, "Huacai Chen" <[email protected]>, [email protected], [email protected]
> 主题: [PATCH] PCI: Honor firmware's device disabled status
>
> If a device has a firmware node (DT/ACPI), and the device is marked
> disabled, that is currently ignored. Add a check for this condition
> and bail out creating the pci_dev.
>
> This assumes the config space for the device can still be accessed
> because they already have by this point in order to identify the device.
>
> Cc: Liu Peibao <[email protected]>
> Cc: Binbin Zhou <[email protected]>
> Cc: Huacai Chen <[email protected]>
> Signed-off-by: Rob Herring <[email protected]>
Tested-by: Binbin Zhou <[email protected]>
> ---
> Please test if this works for Loongson.
> ---
> drivers/pci/probe.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 1779582fb500..b1d80c1d7a69 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -1841,6 +1841,8 @@ int pci_setup_device(struct pci_dev *dev)
>
> pci_set_of_node(dev);
> pci_set_acpi_fwnode(dev);
> + if (dev->dev.fwnode && !fwnode_device_is_available(dev->dev.fwnode))
> + return -ENODEV;
>
> pci_dev_assign_slot(dev);
>
> --
> 2.39.1
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On Fri, Feb 10, 2023 at 10:43:51AM -0600, Rob Herring wrote:
> If a device has a firmware node (DT/ACPI), and the device is marked
> disabled, that is currently ignored. Add a check for this condition
> and bail out creating the pci_dev.
>
> This assumes the config space for the device can still be accessed
> because they already have by this point in order to identify the device.
>
> Cc: Liu Peibao <[email protected]>
> Cc: Binbin Zhou <[email protected]>
> Cc: Huacai Chen <[email protected]>
> Signed-off-by: Rob Herring <[email protected]>
Applied with Binbin's tested-by to pci/enumeration for v6.3, thanks!
> ---
> Please test if this works for Loongson.
> ---
> drivers/pci/probe.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 1779582fb500..b1d80c1d7a69 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -1841,6 +1841,8 @@ int pci_setup_device(struct pci_dev *dev)
>
> pci_set_of_node(dev);
> pci_set_acpi_fwnode(dev);
> + if (dev->dev.fwnode && !fwnode_device_is_available(dev->dev.fwnode))
> + return -ENODEV;
>
> pci_dev_assign_slot(dev);
>
> --
> 2.39.1
>