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.
Signed-off-by: Fabio Estevam <fabio.este...@nxp.com>
---
drivers/pci/pcie_imx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c
index f1e189e..02867e2 100644
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -381,7 +381,7 @@ static int imx_pcie_read_config(struct pci_controller
*hose, pci_dev_t d,
ret = imx_pcie_addr_valid(d);
if (ret) {
*val = 0xffffffff;
- return ret;
+ return PCIBIOS_DEVICE_NOT_FOUND;
}
va_address = get_bus_address(d, where);
--
1.9.1
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