[PATCH V7 2/5] PCI/ASPM: split pci_aspm_init() into two

From: Sinan Kaya
Date: Thu Mar 30 2017 - 09:30:55 EST


Split pci_aspm_init() body into pci_aspm_init_upstream()
and pci_aspm_init_downstream() for bridge and endpoint
specific code behavior.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=194895
Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
---
drivers/pci/pcie/aspm.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index dc36717..a80d64b 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -826,6 +826,16 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev)
return link;
}

+static int pci_aspm_init_downstream(struct pci_dev *pdev)
+{
+ return 0;
+}
+
+static int pci_aspm_init_upstream(struct pci_dev *pdev)
+{
+ return 0;
+}
+
/*
* pci_aspm_init: Initiate PCI express link state.
* It is called from device_add for every single pci device.
@@ -833,7 +843,10 @@ static struct pcie_link_state *alloc_pcie_link_state(struct pci_dev *pdev)
*/
int pci_aspm_init(struct pci_dev *pdev)
{
- return 0;
+ if (!pdev->has_secondary_link)
+ return pci_aspm_init_downstream(pdev);
+
+ return pci_aspm_init_upstream(pdev);
}

/*
--
1.9.1