| Message ID | 20230210164351.2687475-1-robh@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | PCI: Honor firmware's device disabled status | expand |
> -----原始邮件----- > 发件人: "Rob Herring" <robh@kernel.org> > 发送时间:2023-02-11 00:43:51 (星期六) > 收件人: "Bjorn Helgaas" <bhelgaas@google.com> > 抄送: "Liu Peibao" <liupeibao@loongson.cn>, "Binbin Zhou" <zhoubinbin@loongson.cn>, "Huacai Chen" <chenhuacai@loongson.cn>, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org > 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 <liupeibao@loongson.cn> > Cc: Binbin Zhou <zhoubinbin@loongson.cn> > Cc: Huacai Chen <chenhuacai@loongson.cn> > Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Binbin Zhou <zhoubinbin@loongson.cn> > --- > 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 本邮件及其附件含有龙芯中科的商业秘密信息，仅限于发送给上面地址中列出的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制或散发）本邮件及其附件中的信息。如果您错收本邮件，请您立即电话或邮件通知发件人并删除本邮件。 This email and its attachments contain confidential information from Loongson Technology , which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this email in error, please notify the sender by phone or email immediately and delete it.
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 <liupeibao@loongson.cn> > Cc: Binbin Zhou <zhoubinbin@loongson.cn> > Cc: Huacai Chen <chenhuacai@loongson.cn> > Signed-off-by: Rob Herring <robh@kernel.org> 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 >
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);
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(+)