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Date: Thu, 16 Dec 2021 20:46:56 +0800 From: Tiezhu Yang <yangtiezhu@...ngson.cn> To: Xi Ruoyao <xry111@...gyan1223.wang>, Sergio Paracuellos <sergio.paracuellos@...il.com>, tsbogend@...ha.franken.de Cc: robh@...nel.org, arnd@...db.de, catalin.marinas@....com, Liviu.Dudau@....com, bhelgaas@...gle.com, matthias.bgg@...il.com, gregkh@...uxfoundation.org, linux-mips@...r.kernel.org, linux-pci@...r.kernel.org, linux-staging@...ts.linux.dev, neil@...wn.name, linux-kernel@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com> Subject: Re: [PATCH v3 5/6] MIPS: implement architecture-specific 'pci_remap_iospace()' 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@...db.de> >> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.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 https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?h=mips-fixes&id=09d97da660ff77df20984496aa0abcd6b88819f2
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