[PATCH kdrive/ephyr v7 3/9] kdrive: introduce input hot-plugging support for udev and hal backends (#33140)

Laércio de Sousa laerciosousa at sme-mogidascruzes.sp.gov.br
Thu Feb 11 10:23:55 UTC 2016

2016-02-11 0:56 GMT-02:00 Peter Hutterer <peter.hutterer at who-t.net>:

> we don't have a 1:1 mapping between devices and fd (e.g. wacom devices all
> hang off a single fd). Even the fd itself is a DDX concept, so RemoveDevice
> cannot close the fd.
> What should happen here though is that the pDev->public.devicePrivate
> points
> to something kdrive understands and that includes the fd.
Reading kdrive evdev sources, I've found that
EvdevPtrDisable/EvdevKbdDisable functions
do have a KdUnregisterFd() call. Example:

static void
EvdevPtrDisable(KdPointerInfo * pi)
    Kevdev *ke;

    ke = pi->driverPrivate;

    if (!pi || !pi->driverPrivate)

    KdUnregisterFd(pi, ke->fd, TRUE);

    if (ioctl(ke->fd, EVIOCGRAB, 0) < 0)
        perror("Ungrabbing evdev mouse device failed");

    pi->driverPrivate = 0;

However, it seems to fail in my system, because I always get
that "Ungrabbing evdev mouse device failed" error message.

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