Messages in this thread | | | Subject | Re: [PATCH v3 1/6] PCI: designware: remove wrong io_base assignment | From | Stanimir Varbanov <> | Date | Mon, 23 Nov 2015 18:23:47 +0200 |
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On 11/23/2015 12:27 PM, Gabriele Paoloni wrote: > Hi Stanimir, Many Thanks for this fix > >> -----Original Message----- >> From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel- >> owner@vger.kernel.org] On Behalf Of Arnd Bergmann >> Sent: 23 November 2015 10:00 >> To: Stanimir Varbanov >> Cc: linux-arm-msm@vger.kernel.org; linux-kernel@vger.kernel.org; linux-arm- >> kernel@lists.infradead.org; devicetree@vger.kernel.org; linux- >> pci@vger.kernel.org; Bjorn Helgaas; Srinivas Kandagatla; Rob Herring; Rob >> Herring; Mark Rutland; Pawel Moll; Ian Campbell; Jingoo Han; Pratyush Anand; >> Bjorn Andersson >> Subject: Re: [PATCH v3 1/6] PCI: designware: remove wrong io_base assignment >> >> On Monday 23 November 2015 11:28:58 Stanimir Varbanov wrote: >>> The io_base is used to keep the cpu physical address parsed >>> from ranges dt property. After issue pci_remap_iospace the >>> io_base has been assigned with io->start, which is not correct >>> cause io->start is a PCI bus address. >>> >>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> >>> --- >>> drivers/pci/host/pcie-designware.c | 1 - >>> 1 file changed, 1 deletion(-) >>> >>> diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie- >> designware.c >>> index 540f077c37ea..02a7452bdf23 100644 >>> --- a/drivers/pci/host/pcie-designware.c >>> +++ b/drivers/pci/host/pcie-designware.c >>> @@ -440,7 +440,6 @@ int dw_pcie_host_init(struct pcie_port *pp) >>> ret, pp->io); >>> continue; >>> } >>> - pp->io_base = pp->io->start; >>> break; >>> case IORESOURCE_MEM: >>> pp->mem = win->res; >> >> I was surprised to see such an obvious bug here, as we had spent a lot of >> time trying to get it right. However, it broke only recently and it's >> worth mentioning what commit did it, so > > Looking at > "[PATCH v12 0/8] PCI: hisi: Add PCIe host support for HiSilicon SoC Hip05": > > actually the bug came in as patch 3/6 of v11 patchset split > > [...] > > Change from v11: > - Split 3/6 in v11 to 3/8, 4/8, 5/8 in v12. > > [...] > > This was not present in v11...sorry about this. > > Gab > >> >> Fixes: 0021d22b73d6 ("PCI: designware: Use of_pci_get_host_bridge_resources() >> to parse DT") >> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
I think the bug is introduced in:
cbce7900598c ("PCI: designware: Make driver arch-agnostic")
cause the io_base is correctly calculated in 0021d22b73d6, do you agree?
-- regards, Stan
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