Add new pci_enable_msi_partial() interface and use it to conserve on othewise wasted interrupt resources. AHCI driver is the first user which would conserve on 10 out of 16 unused MSI vectors on some Intel chipsets. Cc: linux-doc@xxxxxxxxxxxxxxx Cc: linux-mips@xxxxxxxxxxxxxx Cc: linuxppc-dev@xxxxxxxxxxxxxxxx Cc: linux-s390@xxxxxxxxxxxxxxx Cc: x86@xxxxxxxxxx Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx Cc: linux-ide@xxxxxxxxxxxxxxx Cc: linux-pci@xxxxxxxxxxxxxxx Alexander Gordeev (3): PCI/MSI: Add pci_enable_msi_partial() PCI/MSI/x86: Support pci_enable_msi_partial() AHCI: Use pci_enable_msi_partial() to conserve on 10/16 MSIs Documentation/PCI/MSI-HOWTO.txt | 36 ++++++++++++++-- arch/mips/pci/msi-octeon.c | 2 +- arch/powerpc/kernel/msi.c | 4 +- arch/s390/pci/pci.c | 2 +- arch/x86/include/asm/pci.h | 3 +- arch/x86/include/asm/x86_init.h | 3 +- arch/x86/kernel/apic/io_apic.c | 2 +- arch/x86/kernel/x86_init.c | 4 +- arch/x86/pci/xen.c | 9 +++- drivers/ata/ahci.c | 4 +- drivers/iommu/irq_remapping.c | 10 ++-- drivers/pci/msi.c | 83 ++++++++++++++++++++++++++++++++++----- include/linux/msi.h | 5 +- include/linux/pci.h | 3 + 14 files changed, 134 insertions(+), 36 deletions(-) -- 1.7.7.6
