Re: [libvirt] [PATCH] driver core: platform: add device binding path 'driver_override'

-----Original Message----- From: Kim Phillips [mailto:kim.phillips@freescale.com] Sent: Tuesday, April 08, 2014 8:47 PM To: Alex Williamson; gregkh(a)linuxfoundation.org Cc: bhelgaas(a)google.com; linux-pci(a)vger.kernel.org; kvm(a)vger.kernel.org; konrad.wilk(a)oracle.com; Yoder Stuart-B08248; libvir-list(a)redhat.com; iommu(a)lists.linux-foundation.org; tech(a)virtualopensystems.com; kvmarm(a)lists.cs.columbia.edu; linux-kernel(a)vger.kernel.org; Guenter Roeck; christoffer.dall(a)linaro.org Subject: [PATCH] driver core: platform: add device binding path 'driver_override' Needed by platform device drivers, such as the vfio-platform driver [1], in order to bypass the existing OF, ACPI, id_table and name string matches, and successfully be able to be bound to any device, like so: echo vfio-platform > /sys/bus/platform/devices/fff51000.ethernet/driver_override echo fff51000.ethernet > /sys/bus/platform/devices/fff51000.ethernet/driver/unbind echo fff51000.ethernet > /sys/bus/platform/drivers_probe This mimics "PCI: Introduce new device binding path using pci_dev.driver_override" [2], which is an interface enhancement for more deterministic PCI device binding, e.g., when in the presence of hotplug. [1] http://lkml.iu.edu/hypermail/linux/kernel/1402.1/00177.html [2] http://lists-archives.com/linux-kernel/28030441-pci-introduce-new- device-binding-path-using-pci_dev-driver_override.html Suggested-by: Alex Williamson <alex.williamson(a)redhat.com&gt; Signed-off-by: Kim Phillips <kim.phillips(a)freescale.com&gt; ---