[PATCH v1] arm64:pci: fix the IOV device enabled crash issue in designware

[Po Liu]

When echo a number to /sys/bus/pci/devices/xxx/sriov_numvfs to enable the
VF devices. A crash log occurred. This found to be access the IOV devices
config space failure issue.

The read/write config space from host would judge the pcie device plugin
or not by:

if (bus->primary == pp->root_bus_nr && dev > 0)
    return 0;

Although all pcie devices for dev(coming from the device and function
number) is zero. But the dev is not zero for VF. So remove the
condition.

Signed-off-by: Po Liu <po.liu at nxp.com>
---
 drivers/pci/host/pcie-designware.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 12afce1..dd20eb2 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -670,13 +670,6 @@ static int dw_pcie_valid_config(struct pcie_port *pp,
 	if (bus->number == pp->root_bus_nr && dev > 0)
 		return 0;
 
-	/*
-	 * do not read more than one device on the bus directly attached
-	 * to RC's (Virtual Bridge's) DS side.
-	 */
-	if (bus->primary == pp->root_bus_nr && dev > 0)
-		return 0;
-
 	return 1;
 }
 
-- 
2.1.0.27.g96db324