Re: [PATCH v3 5/6] MIPS: implement architecture-specific 'pci_remap_iospace()'

Tiezhu Yang
2021-12-16T12:47:23Z

On 12/16/2021 07:44 PM, Xi Ruoyao wrote:
> On Sat, 2021-09-25 at 22:32 +0200, Sergio Paracuellos wrote:
>> To make PCI IO work we need to properly virtually map IO cpu physical address
>> and set this virtual address as the address of the first PCI IO port which
>> is set using function 'set_io_port_base()'.
>>
>> Acked-by: Arnd Bergmann <arnd@arndb.de>
>> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
>
> Hi,
>
> the change is causing a WARNING on loongson64g-4core-ls7a:
>
> [ 0.105781] loongson-pci 1a000000.pci: IO 0x0018020000..0x001803ffff ->
> 0x0000020000
> [ 0.105792] loongson-pci 1a000000.pci: MEM 0x0040000000..0x007fffffff ->
> 0x0040000000
> [ 0.105801] ------------[ cut here ]------------
> [ 0.105804] WARNING: CPU: 0 PID: 1 at arch/mips/pci/pci-generic.c:55 pci_remap_iospace+0x80/0x88
> [ 0.105815] resource start address is not zero
>
> I'm not sure how to fix this one.
>

MIPS: Only define pci_remap_iospace() for Ralink