Re: [PATCH v3 12/26] PCI: keystone: Prevent ARM32 specific code to be compiled for ARM64

[Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>]

On Mon, Mar 25, 2019 at 03:09:33PM +0530, Kishon Vijay Abraham I wrote:
> hook_fault_code is an ARM32 specific API for hooking into data abort.
> Since pci-keystone.c will be used for AM65X platforms which is an
> ARM64 platform,

Hi Kishon,

How is the problem plugged by the fault hook fixed on ARM64 ?

Thanks,
Lorenzo

> allow hook_fault_code to be compiled only for ARM32.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  drivers/pci/controller/dwc/pci-keystone.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
> index dfe54553d832..93296d434f40 100644
> --- a/drivers/pci/controller/dwc/pci-keystone.c
> +++ b/drivers/pci/controller/dwc/pci-keystone.c
> @@ -710,6 +710,7 @@ static int ks_pcie_config_legacy_irq(struct keystone_pcie *ks_pcie)
>  	return ret;
>  }
>  
> +#ifdef CONFIG_ARM
>  /*
>   * When a PCI device does not exist during config cycles, keystone host gets a
>   * bus error instead of returning 0xffffffff. This handler always returns 0
> @@ -729,6 +730,7 @@ static int ks_pcie_fault(unsigned long addr, unsigned int fsr,
>  
>  	return 0;
>  }
> +#endif
>  
>  static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie)
>  {
> @@ -778,12 +780,14 @@ static int __init ks_pcie_host_init(struct pcie_port *pp)
>  	if (ret < 0)
>  		return ret;
>  
> +#ifdef CONFIG_ARM
>  	/*
>  	 * PCIe access errors that result into OCP errors are caught by ARM as
>  	 * "External aborts"
>  	 */
>  	hook_fault_code(17, ks_pcie_fault, SIGBUS, 0,
>  			"Asynchronous external abort");
> +#endif
>  
>  	ks_pcie_start_link(pci);
>  	dw_pcie_wait_for_link(pci);
> -- 
> 2.17.1
>