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In recent kernels, hiddev* devices now have class "usbmisc", rather than "usb" (see http://www.spinics.net/lists/linux-usb/msg62276.html ). This change translates into a change in SUBSYSTEM matching for hiddev* devices. This fix addresses this for recent kernels while retaining existing behavior. For reference, here is an attribute-walk for a CyberPower CPS 1500C on kernel 3.7.0: [Ubuntu bug #1091702: udev rules fail to match hid devices with new kernels] udevadm info --attribute-walk --path=/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0/usbmisc/hiddev0 Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device. looking at device '/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0/usbmisc/hiddev0': KERNEL=="hiddev0" SUBSYSTEM=="usbmisc" DRIVER=="" looking at parent device '/devices/pci0000:00/0000:00:1d.2/usb4/4-1/4-1:1.0': KERNELS=="4-1:1.0" SUBSYSTEMS=="usb" DRIVERS=="usbhid" ATTRS{bInterfaceClass}=="03" ATTRS{bInterfaceSubClass}=="00" ATTRS{bInterfaceProtocol}=="00" ATTRS{bNumEndpoints}=="01" ATTRS{supports_autosuspend}=="1" ATTRS{bAlternateSetting}==" 0" ATTRS{bInterfaceNumber}=="00" looking at parent device '/devices/pci0000:00/0000:00:1d.2/usb4/4-1': KERNELS=="4-1" SUBSYSTEMS=="usb" DRIVERS=="usb" ATTRS{bDeviceSubClass}=="00" ATTRS{bDeviceProtocol}=="00" ATTRS{devpath}=="1" ATTRS{idVendor}=="0764" ATTRS{speed}=="1.5" ATTRS{bNumInterfaces}==" 1" ATTRS{bConfigurationValue}=="1" ATTRS{bMaxPacketSize0}=="8" ATTRS{busnum}=="4" ATTRS{devnum}=="2" ATTRS{configuration}=="" ATTRS{bMaxPower}==" 50mA" ATTRS{authorized}=="1" ATTRS{bmAttributes}=="c0" ATTRS{bNumConfigurations}=="1" ATTRS{maxchild}=="0" ATTRS{bcdDevice}=="0001" ATTRS{avoid_reset_quirk}=="0" ATTRS{quirks}=="0x0" ATTRS{version}==" 1.10" ATTRS{urbnum}=="36" ATTRS{ltm_capable}=="no" ATTRS{manufacturer}=="CPS" ATTRS{removable}=="unknown" ATTRS{idProduct}=="0501" ATTRS{bDeviceClass}=="00" ATTRS{product}==" CP 1500C" looking at parent device '/devices/pci0000:00/0000:00:1d.2/usb4': KERNELS=="usb4" SUBSYSTEMS=="usb" DRIVERS=="usb" ATTRS{bDeviceSubClass}=="00" ATTRS{bDeviceProtocol}=="00" ATTRS{devpath}=="0" ATTRS{idVendor}=="1d6b" ATTRS{speed}=="12" ATTRS{bNumInterfaces}==" 1" ATTRS{bConfigurationValue}=="1" ATTRS{bMaxPacketSize0}=="64" ATTRS{authorized_default}=="1" ATTRS{busnum}=="4" ATTRS{devnum}=="1" ATTRS{configuration}=="" ATTRS{bMaxPower}==" 0mA" ATTRS{authorized}=="1" ATTRS{bmAttributes}=="e0" ATTRS{bNumConfigurations}=="1" ATTRS{maxchild}=="2" ATTRS{bcdDevice}=="0307" ATTRS{avoid_reset_quirk}=="0" ATTRS{quirks}=="0x0" ATTRS{serial}=="0000:00:1d.2" ATTRS{version}==" 1.10" ATTRS{urbnum}=="50" ATTRS{ltm_capable}=="no" ATTRS{manufacturer}=="Linux 3.7.0-030700-generic uhci_hcd" ATTRS{removable}=="unknown" ATTRS{idProduct}=="0001" ATTRS{bDeviceClass}=="09" ATTRS{product}=="UHCI Host Controller" looking at parent device '/devices/pci0000:00/0000:00:1d.2': KERNELS=="0000:00:1d.2" SUBSYSTEMS=="pci" DRIVERS=="uhci_hcd" ATTRS{irq}=="18" ATTRS{subsystem_vendor}=="0x1028" ATTRS{broken_parity_status}=="0" ATTRS{class}=="0x0c0300" ATTRS{consistent_dma_mask_bits}=="32" ATTRS{dma_mask_bits}=="32" ATTRS{local_cpus}=="00000000,00000000,00000000,00000000,00000000,00000000,00000000,000000ff" ATTRS{device}=="0x268a" ATTRS{msi_bus}=="" ATTRS{local_cpulist}=="0-7" ATTRS{vendor}=="0x8086" ATTRS{subsystem_device}=="0x021e" ATTRS{numa_node}=="-1" ATTRS{d3cold_allowed}=="0" looking at parent device '/devices/pci0000:00': KERNELS=="pci0000:00" SUBSYSTEMS=="" DRIVERS=="" Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Richard Hughes <richard@hughsie.com>
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