On Tuesday, October 18, 2016 4:26 AM, Lucas Stach wrote:
>
> The function used to determine if iATU unroll is available will read a RC
register.
> This is not possible and will result in a system hang if the RC is still
in reset,
> so it is only safe to call this function after host_init() has been
called.
>
> Fixes: a0601a470537 (PCI: designware: Add iATU Unroll feature)
> Reported-by: Gary Bisson <gary.bisson@xxxxxxxxxxxxxxxxxxx>
> Tested-by: Gary Bisson <gary.bisson@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
It looks good!
Acked-by: Jingoo Han <jigoohan1@xxxxxxxxx>
> ---
> drivers/pci/host/pcie-designware.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-designware.c
b/drivers/pci/host/pcie-designware.c
> index 035f50c03281..74510508fafc 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -637,11 +637,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
> }
> }
>
> - pp->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pp);
> -
> if (pp->ops->host_init)
> pp->ops->host_init(pp);
>
> + pp->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pp);
> +
> pp->root_bus_nr = pp->busn->start;
> if (IS_ENABLED(CONFIG_PCI_MSI)) {
> bus = pci_scan_root_bus_msi(pp->dev, pp->root_bus_nr,
> --
> 2.9.3
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