From: Victor Gu xigu@marvell.com
The PCI configuration space read/write functions were special casing the situation where PCI_SLOT(devfn) != 0, and returned PCIBIOS_DEVICE_NOT_FOUND in this case.
However, while this is what is intended for the root bus, it is not intended for the child busses, as it prevents discovering devices with PCI_SLOT(x) != 0. Therefore, we return PCIBIOS_DEVICE_NOT_FOUND only if we're on the root bus.
Fixes: 8c39d710363c1 ("PCI: aardvark: Add Aardvark PCI host controller driver") Cc: stable@vger.kernel.org Signed-off-by: Victor Gu xigu@marvell.com Reviewed-by: Wilson Ding dingwei@marvell.com Reviewed-by: Nadav Haklai nadavh@marvell.com [Thomas: tweak commit log.] Signed-off-by: Thomas Petazzoni thomas.petazzoni@free-electrons.com --- Changes since v2: - The logic has been factorized into a advk_pcie_valid_device() helper in a previous patch, so this patch was adjusted accordingly. --- drivers/pci/host/pci-aardvark.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c index ccd0304a0c21..be140dc7109b 100644 --- a/drivers/pci/host/pci-aardvark.c +++ b/drivers/pci/host/pci-aardvark.c @@ -433,7 +433,7 @@ static int advk_pcie_wait_pio(struct advk_pcie *pcie) static int advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus, int devfn) { - if (PCI_SLOT(devfn) != 0) + if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0) return false;
return true;