Messages in this thread Patch in this message | | | From | Rob Herring <> | Subject | [PATCH] PCI: Honor firmware's device disabled status | Date | Fri, 10 Feb 2023 10:43:51 -0600 |
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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 <liupeibao@loongson.cn> Cc: Binbin Zhou <zhoubinbin@loongson.cn> Cc: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: Rob Herring <robh@kernel.org> --- 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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