reviewed-by: Minghuan Lian <Minghuan.Lian@xxxxxxx>
> -----Original Message-----
> From: Z.q. Hou
> Sent: Tuesday, November 20, 2018 5:27 PM
> To: linux-pci@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> bhelgaas@xxxxxxxxxx; robh+dt@xxxxxxxxxx; mark.rutland@xxxxxxx;
> l.subrahmanya@xxxxxxxxxxxxxx; shawnguo@xxxxxxxxxx; Leo Li
> <leoyang.li@xxxxxxx>; lorenzo.pieralisi@xxxxxxx;
> catalin.marinas@xxxxxxx; will.deacon@xxxxxxx
> Cc: Mingkai Hu <mingkai.hu@xxxxxxx>; M.h. Lian
> <minghuan.lian@xxxxxxx>; Xiaowei Bao <xiaowei.bao@xxxxxxx>; Z.q. Hou
> <zhiqiang.hou@xxxxxxx>
> Subject: [PATCHv2 17/25] PCI: mobiveil: fix the checking of valid device
>
> From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
>
> Avoid to issue CFG transactions to link partner when the PCIe link is not up.
> And allow CFG transactions to all functions of Endpoint implemented
> multiple functions.
>
> Fixes: 9af6bcb11e12 ("PCI: mobiveil: Add Mobiveil PCIe Host Bridge IP driver")
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
> ---
> V2:
> - New patch
>
> drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> index dc5324d94466..1ae82e790562 100644
> --- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
> @@ -29,6 +29,10 @@ static bool mobiveil_pcie_valid_device(struct pci_bus
> *bus, unsigned int devfn) {
> struct mobiveil_pcie *pcie = bus->sysdata;
>
> + /* If there is no link, then there is no device */
> + if (bus->number > pcie->rp.root_bus_nr
> && !mobiveil_pcie_link_up(pcie))
> + return false;
> +
> /* Only one device down on each root port */
> if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0))
> return false;
> @@ -37,7 +41,7 @@ static bool mobiveil_pcie_valid_device(struct pci_bus
> *bus, unsigned int devfn)
> * Do not read more than one device on the bus directly
> * attached to RC
> */
> - if ((bus->primary == pcie->rp.root_bus_nr) && (devfn > 0))
> + if ((bus->primary == pcie->rp.root_bus_nr) && (PCI_SLOT(devfn) > 0))
> return false;
>
> return true;
> --
> 2.17.1
