Memory-Write-Invalidate isn't applicable for PCIe devices, therefore
make the MWI functions a dummy and don't even write to the (dummy)
PCI config space registers.
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
drivers/pci/pci.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d068f11d0..fb63b3d89 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4137,6 +4137,9 @@ int pci_set_mwi(struct pci_dev *dev)
int rc;
u16 cmd;
+ if (pci_is_pcie(dev))
+ return 0;
+
rc = pci_set_cacheline_size(dev);
if (rc)
return rc;
@@ -4203,6 +4206,9 @@ void pci_clear_mwi(struct pci_dev *dev)
#ifndef PCI_DISABLE_MWI
u16 cmd;
+ if (pci_is_pcie(dev))
+ return;
+
pci_read_config_word(dev, PCI_COMMAND, &cmd);
if (cmd & PCI_COMMAND_INVALIDATE) {
cmd &= ~PCI_COMMAND_INVALIDATE;
--
2.19.1
