> -----Original Message----- > From: Bjorn Helgaas [mailto:helgaas@xxxxxxxxxx] > Sent: Wednesday, February 3, 2016 10:25 AM > To: Jake Oshins <jakeo@xxxxxxxxxxxxx> > Cc: gregkh@xxxxxxxxxxxxxxxxxxx; KY Srinivasan <kys@xxxxxxxxxxxxx>; linux- > kernel@xxxxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxxxx; Haiyang Zhang > <haiyangz@xxxxxxxxxxxxx>; marc.zyngier@xxxxxxx; > bhelgaas@xxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx > Subject: Re: [PATCH RESEND 1/3] PCI: Add fwnode_handle to pci_sysdata > > Hi Jake, > > On Tue, Feb 02, 2016 at 05:41:41PM +0000, jakeo@xxxxxxxxxxxxx wrote: > > From: Jake Oshins <jakeo@xxxxxxxxxxxxx> > > > > This patch adds an fwnode_handle to struct pci_sysdata, which is used > > by the next patch in the series when trying to locate an IRQ domain > > associated with a root PCI bus. > > > > Signed-off-by: Jake Oshins <jakeo@xxxxxxxxxxxxx> > > --- > > arch/x86/include/asm/pci.h | 15 +++++++++++++++ > > drivers/pci/probe.c | 1 + > > include/linux/pci.h | 4 ++++ > > 3 files changed, 20 insertions(+) > > > > diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h > > index 4625943..6fc3c7c 100644 > > --- a/arch/x86/include/asm/pci.h > > +++ b/arch/x86/include/asm/pci.h > > @@ -20,6 +20,9 @@ struct pci_sysdata { #ifdef CONFIG_X86_64 > > void *iommu; /* IOMMU private data */ > > #endif > > +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN > > + void *fwnode; /* IRQ domain for MSI assignment */ > > +#endif > > }; > > > > extern int pci_routeirq; > > @@ -32,6 +35,7 @@ extern int noioapicreroute; static inline int > > pci_domain_nr(struct pci_bus *bus) { > > struct pci_sysdata *sd = bus->sysdata; > > + > > return sd->domain; > > } > > > > @@ -41,6 +45,17 @@ static inline int pci_proc_domain(struct pci_bus > > *bus) } #endif > > > > +#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN > > +static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) { > > + struct pci_sysdata *sd = bus->sysdata; > > + > > + return sd->fwnode; > > +} > > + > > +#define pci_root_bus_fwnode _pci_root_bus_fwnode > > +#endif > > + > > /* Can be used to override the logic in pci_scan_bus for skipping > > already-configured bus numbers - to be used for buggy BIOSes > > or architectures with incomplete PCI setup by the loader */ diff > > --git a/drivers/pci/probe.c b/drivers/pci/probe.c index > > 6d7ab9b..b207e74 100644 > > --- a/drivers/pci/probe.c > > +++ b/drivers/pci/probe.c > > @@ -15,6 +15,7 @@ > > #include <linux/pci-aspm.h> > > #include <linux/aer.h> > > #include <linux/acpi.h> > > +#include <linux/irqdomain.h> > > You're not adding a use of anything in irqdomain.h. It looks like this hunk > should be moved to the second patch. Wil do. > > > #include <asm-generic/pci-bridge.h> > > #include "pci.h" > > > > diff --git a/include/linux/pci.h b/include/linux/pci.h index > > 27df4a6..cd05a8e 100644 > > --- a/include/linux/pci.h > > +++ b/include/linux/pci.h > > @@ -1515,6 +1515,10 @@ static inline int pci_get_new_domain_nr(void) { > > return -ENOSYS; } > > > > #include <asm/pci.h> > > > > +#ifndef pci_root_bus_fwnode > > +#define pci_root_bus_fwnode(bus) ((void)(bus), NULL) > > Huh, interesting. This is new for me; I guess the idea is that we at least > evaluate "bus" even when pci_root_bus_fwnode isn't defined, so the > compiler can catch egregious errors? > This was a suggestion by Mark Zyngier. It made the non-x86 architectures build benignly. If you'd like it done differently, I'm open to suggestion. Thanks, Jake Oshins _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
