On 11/01/14 00:27, Ping Cheng wrote:
If touch_input is NULL on FreeBSD, you need to figure out the root
cause. Checking on touch_input itself would not fix the root cause...
Right.
The root cause is that FreeBSD launches two instances of the driver,
running in two different userland processes, for the two different Wacom
interfaces on a common USB device. In Linux the wacom interface drivers
are running from the same kernel, and can share the data in question,
but in FreeBSD's webcamd emulation, this doesn't work. Then the first
wacom probe call would have to grab the second interface.
Technically speaking this is a FreeBSD only problem and I plan to
deliver a patch with the webcamd software to fix this, like already
suggested to you guys. This situation can also happen on Linux in case
of a "BadUSB" device. That's why I think that the NULL check should be
upstreamed.
--HPS
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