We assumed pcie root port and downstream port always have
pcie link, but in some unusual pcie topology platform like
ATCA, it may has the following pcie tree:
root port ---- downstream port -----upstream port
|
|downstream port
Now we introduce a flag pdev->has_secondary_link to tag
a device whether has pcie link, use it instead.
Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
---
drivers/pci/pcie/aer/aerdrv_core.c | 3 +--
drivers/pci/probe.c | 2 +-
drivers/pci/vc.c | 3 +--
3 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 5653ea9..9803e3d 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -425,8 +425,7 @@ static pci_ers_result_t reset_link(struct pci_dev *dev)
if (driver && driver->reset_link) {
status = driver->reset_link(udev);
- } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM ||
- pci_pcie_type(udev) == PCI_EXP_TYPE_ROOT_PORT) {
+ } else if (udev->has_secondary_link) {
status = default_reset_link(udev);
} else {
dev_printk(KERN_DEBUG, &dev->dev,
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 192c6b9..eba4928 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1645,7 +1645,7 @@ static int only_one_child(struct pci_bus *bus)
return 0;
if (pci_pcie_type(parent) == PCI_EXP_TYPE_ROOT_PORT)
return 1;
- if (pci_pcie_type(parent) == PCI_EXP_TYPE_DOWNSTREAM &&
+ if (parent->has_secondary_link &&
!pci_has_flag(PCI_SCAN_ALL_PCIE_DEVS))
return 1;
return 0;
diff --git a/drivers/pci/vc.c b/drivers/pci/vc.c
index 7e1304d..dfbab61 100644
--- a/drivers/pci/vc.c
+++ b/drivers/pci/vc.c
@@ -108,8 +108,7 @@ static void pci_vc_enable(struct pci_dev *dev, int pos, int res)
struct pci_dev *link = NULL;
/* Enable VCs from the downstream device */
- if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
- pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM)
+ if (!dev->has_secondary_link)
return;
ctrl_pos = pos + PCI_VC_RES_CTRL + (res * PCI_CAP_VC_PER_VC_SIZEOF);
--
1.7.1
--
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