From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Subject: Re: [PATCH v3 2/2] pci/aer: interrupt fixup in the quirk Date: Fri, 29 Jul 2016 17:41:54 -0500 Message-ID: <20160729224154.GC13632@localhost> References: <1464242406-20203-1-git-send-email-po.liu@nxp.com> <1465892645-32381-1-git-send-email-po.liu@nxp.com> <1465892645-32381-2-git-send-email-po.liu@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1465892645-32381-2-git-send-email-po.liu-3arQi8VN3Tc@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Po Liu Cc: linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Roy Zang , Arnd Bergmann , Marc Zyngier , Stuart Yoder , Yang-Leo Li , Minghuan Lian , Murali Karicheri , Bjorn Helgaas , Shawn Guo , Mingkai Hu List-Id: devicetree@vger.kernel.org On Tue, Jun 14, 2016 at 04:24:05PM +0800, Po Liu wrote: > On some platforms, root port doesn't support MSI/MSI-X/INTx in RC mode. > When chip support the aer interrupt with none MSI/MSI-X/INTx mode, > maybe there is interrupt line for aer pme etc. Search the interrupt > number in the fdt file. Then fixup the dev->irq with it. > > Signed-off-by: Po Liu I'm not sure where we're at with this. Dongdong had some issue (possibly with a version of the quirk on a different platform?), and I think the suggestion of explicitly checking for a root port device was a good one. So please update and repost this for next cycle. > --- > changes for V3: > - Move to quirk; > - Only correct the irq in RC mode; > > drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index ee72ebe..8b39cce 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -25,6 +25,7 @@ > #include > #include > #include > +#include > #include /* isa_dma_bridge_buggy */ > #include "pci.h" > > @@ -4419,3 +4420,31 @@ static void quirk_intel_qat_vf_cap(struct pci_dev *pdev) > } > } > DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap); > + > +/* If root port doesn't support MSI/MSI-X/INTx in RC mode, > + * but use standalone irq. Read the device tree for the aer > + * interrupt number. > + */ > +static void quirk_aer_interrupt(struct pci_dev *dev) > +{ > + int ret; > + u8 header_type; > + struct device_node *np = NULL; > + > + /* Only for the RC mode device */ > + pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type); > + if ((header_type & 0x7F) != PCI_HEADER_TYPE_BRIDGE) > + return; > + > + if (dev->bus->dev.of_node) > + np = dev->bus->dev.of_node; > + > + if (IS_ENABLED(CONFIG_OF_IRQ) && np) { > + ret = of_irq_get_byname(np, "aer"); > + if (ret > 0) { > + dev->no_msi = 1; > + dev->irq = ret; > + } > + } > +} > +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_aer_interrupt); > -- > 2.1.0.27.g96db324 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html