• Bjørn Mork's avatar
    USB: cdc-wdm: Avoid hanging on interface with no USB_CDC_DMM_TYPE · 7e3054a0
    Bjørn Mork authored
    The probe does not strictly require the USB_CDC_DMM_TYPE
    descriptor, which is a good thing as it makes the driver
    usable on non-conforming interfaces.  A user could e.g.
    bind to it to a CDC ECM interface by using the new_id and
    bind sysfs files.  But this would fail with a 0 buffer length
    due to the missing descriptor.
    
    Fix by defining a reasonable fallback size: The minimum
    device receive buffer size required by the CDC WMC standard,
    revision 1.1
    Signed-off-by: default avatarBjørn Mork <bjorn@mork.no>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    7e3054a0
cdc-wdm.c 19.4 KB