From: Fabio Estevam <fabio.este...@nxp.com>
Since commit ff3e077bd2 ("dm: pci: Add a uclass for PCI") the following
error message is seen:
=> pci 0
Scanning PCI devices on bus 0
BusDevFun VendorId DeviceId Device Class Sub-Class
_____________________________________________________________
00.01.00 0x16c3 0xabcd Bridge device 0x04
Cannot read bus configuration: -1
We can avoid this error by using the same approach as done in the
linux kernel PCI designware driver: (drivers/pci/host/pcie-designware.c)
static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
struct pcie_port *pp = bus->sysdata;
int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
,where PCIBIOS_DEVICE_NOT_FOUND is returned when an invalid address
is given.
Reported-by: Bin Meng <bmeng...@gmail.com>
Signed-off-by: Fabio Estevam <fabio.este...@nxp.com>
---
drivers/pci/pcie_layerscape.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 58e88ae..af0fd71 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -314,7 +314,7 @@ static int ls_pcie_read_config(struct pci_controller *hose,
pci_dev_t d,
if (ls_pcie_addr_valid(hose, d)) {
*val = 0xffffffff;
- return -EINVAL;
+ return PCIBIOS_DEVICE_NOT_FOUND;
}
if (PCI_BUS(d) == hose->first_busno) {
--
1.9.1
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