[U-Boot] [PATCH 3/3] pcie_layerscape: Adjust the return value when ls_pcie_addr_valid() fails

[Marek Vasut <marex@denx.de>]

On Wednesday, January 06, 2016 at 09:53:18 PM, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@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.cn@gmail.com>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

Good stuff, thanks!

Acked-by: Marek Vasut <marex@denx.de>

I added Stefano on CC, so I added him. I'd like to see all three in mainline for 
this MW.

Best regards,
Marek Vasut