On Thu, 1 Feb 2024, Tobita, Tatsunosuke wrote:
> From: Tatsunosuke Tobita <tatsunosuke.tobita@xxxxxxxxx>
>
> The xf86-input-wacom driver does not treat '0' as a valid serial
> number and will drop any input report which contains an
> MSC_SERIAL = 0 event. The kernel driver already takes care to
> avoid sending any MSC_SERIAL event if the value of serial[0] == 0
> (which is the case for devices that don't actually report a
> serial number), but this is not quite sufficient.
> Only the lower 32 bits of the serial get reported to userspace,
> so if this portion of the serial is zero then there can still
> be problems.
>
> This commit allows the driver to report either the lower 32 bits
> if they are non-zero or the upper 32 bits otherwise.
>
> Signed-off-by: Jason Gerecke <jason.gerecke@xxxxxxxxx>
> Signed-off-by: Tatsunosuke Tobita <tatsunosuke.tobita@xxxxxxxxx>
> Fixes: f85c9dc678a5 ("HID: wacom: generic: Support tool ID and additional tool types")
> CC: stable@xxxxxxxxxxxxxxx # v4.10
Applied to hid.git#for-6.8/upstream-fixes.
--
Jiri Kosina
SUSE Labs
