[PATCH v3 7/7] PCI: Skip Enhanced Allocation (EA) initialization for VF device

From: sathyanarayanan . kuppuswamy
Date: Thu Jun 20 2019 - 16:41:19 EST


From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>

As per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced Allocation
Capability. So skip pci_ea_init() for virtual devices.

Cc: Ashok Raj <ashok.raj@xxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Suggested-by: Ashok Raj <ashok.raj@xxxxxxxxx>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
---
drivers/pci/pci.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 8abc843b1615..c299ab470351 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2986,6 +2986,13 @@ void pci_ea_init(struct pci_dev *dev)
int offset;
int i;

+ /*
+ * Per PCIe r4.0, sec 9.3.6, VF must not implement Enhanced
+ * Allocation Capability.
+ */
+ if (dev->is_virtfn)
+ return;
+
/* find PCI EA capability in list */
ea = pci_find_capability(dev, PCI_CAP_ID_EA);
if (!ea)
--
2.21.0