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| author | Rob Herring <robh@kernel.org> | 2023-04-19 21:35:13 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-04-20 20:30:14 +0200 |
| commit | 0d21e71a91debc87e88437a2cf9c6f34f8bf012f (patch) | |
| tree | 5d4415d145c66be9d22a35d377e38b2555869e38 /drivers/pci/probe.c | |
| parent | Linux 6.3-rc1 (diff) | |
| download | linux-0d21e71a91debc87e88437a2cf9c6f34f8bf012f.tar.xz linux-0d21e71a91debc87e88437a2cf9c6f34f8bf012f.zip | |
PCI: Restrict device disabled status check to DT
Commit 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
checked the firmware device status for both DT and ACPI devices. That
caused a regression in some ACPI systems. The exact reason isn't clear.
It's possibly a firmware bug. For now, at least, refactor the check to
be for DT based systems only.
Note that the original implementation leaked a refcount which is now
correctly handled.
[bhelgaas: Per ACPI r6.5, sec 6.3.7, for devices on an enumerable bus, _STA
must return with bit[0] ("device is present") set]
Link: https://lore.kernel.org/all/m2fs9lgndw.fsf@gmail.com/
Fixes: 6fffbc7ae137 ("PCI: Honor firmware's device disabled status")
Link: https://lore.kernel.org/r/20230419193513.708818-1-robh@kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217317
Reported-by: Donald Hunter <donald.hunter@gmail.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Donald Hunter <donald.hunter@gmail.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Binbin Zhou <zhoubinbin@loongson.cn>
Cc: Liu Peibao <liupeibao@loongson.cn>
Cc: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to '')
| -rw-r--r-- | drivers/pci/probe.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a3f68b6ba6ac..f96fa83f2627 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1826,7 +1826,7 @@ int pci_setup_device(struct pci_dev *dev) u32 class; u16 cmd; u8 hdr_type; - int pos = 0; + int err, pos = 0; struct pci_bus_region region; struct resource *res; @@ -1840,10 +1840,10 @@ int pci_setup_device(struct pci_dev *dev) dev->error_state = pci_channel_io_normal; set_pcie_port_type(dev); - pci_set_of_node(dev); + err = pci_set_of_node(dev); + if (err) + return err; pci_set_acpi_fwnode(dev); - if (dev->dev.fwnode && !fwnode_device_is_available(dev->dev.fwnode)) - return -ENODEV; pci_dev_assign_slot(dev); |