On Mon, Oct 24, 2016 at 6:31 AM, Sinan Kaya <okaya@xxxxxxxxxxxxxx> wrote: > > By the time ACPI gets initialized, this code tries to determine an > IRQ number based on penalty values in this array. It will try to locate > the IRQ with the least penalty assignment so that interrupt sharing is > avoided if possible. > > A couple of notes about the external APIs: > 1. These API can be called before the ACPI is started. Therefore, one > cannot assume that the PCI link objects are initialized for calculating > penalties. > 2. The polarity and trigger information passed via the > acpi_penalize_sci_irq from the BIOS may not match what the IRQ subsystem > is reporting as the call might have been placed before the IRQ is > registered by the interrupt subsystem. > > The reverted changes were in the direction to remove these external API and > try to calculate the penalties at runtime for the ISA, SCI as well as PCI > IRQS. > This didn't work out well with the existing platforms. > > V5: > * clean up the commit message for 1/3 and 2/3 > * drop 3/3 > * bring back ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts as 3/3 > > V4: > https://www.spinics.net/lists/arm-kernel/msg537158.html > * Drop ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts > * A new patch to isolate early boot ISA penalty calculations from dynamic > penalty calculation by directly modifying the array members in > ("ACPI, PCI, IRQ: assign ISA IRQ directly during early boot stages") > * Now that we isolated both SCI and ISA interrupts, revert commit ("Revert > "ACPI,PCI,IRQ: separate ISA penalty calculation"") and commit > ("487cf917ed0d > (Revert "ACPI, PCI, IRQ: remove redundant code in acpi_irq_penalty_init()") > to share code between ISA and PCI penalties as originally intended. > > V3: > http://www.spinics.net/lists/arm-kernel/msg536208.html > * drop patch #1 as discussed with Bjorn > * add patch #3 to track SCI irq and penalty separately > > V2: https://lkml.org/lkml/2016/10/1/106 > * Commit message updates > > V1: > http://lists-archives.com/linux-kernel/28673954-revert-acpi-pci-irq-reduce-static-irq-array-size-to-16.html > * initial implementation > > Sinan Kaya (3): > ACPI, PCI, IRQ: assign ISA IRQ directly during early boot stages > ACPI: pci_link: penalize SCI correctly > ACPI: pci_link: Include PIRQ_PENALTY_PCI_USING for ISA IRQs > > arch/x86/kernel/acpi/boot.c | 1 + > drivers/acpi/pci_link.c | 38 +++++++++++++++++++++----------------- > include/linux/acpi.h | 1 + > 3 files changed, 23 insertions(+), 17 deletions(-) I've queued up this series for the next ACPI pull request with 4.9 fixes. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
