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backport: HID: wacom: Read HID_DG_CONTACTMAX directly for non-generic…
… devices We've recently switched from extracting the value of HID_DG_CONTACTMAX at a fixed offset (which may not be correct for all tablets) to injecting the report into the driver for the generic codepath to handle. Unfortunately, this change was made for *all* tablets, even those which aren't generic. Because `wacom_wac_report` ignores reports from non- generic devices, the contact count never gets initialized. Ultimately this results in the touch device itself failing to probe, and thus the loss of touch input. This commit adds back the fixed-offset extraction for non-generic devices. Link: linuxwacom#155 Fixes: 184eccd40389 ("HID: wacom: generic: read HID_DG_CONTACTMAX from any feature report") Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Reviewed-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com> CC: stable@vger.kernel.org # 5.3+ Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> [jason.gerecke@wacom.com: Imported into input-wacom (778fbf417999)] Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> [jason.gerecke@wacom.com: Backported from input-wacom (ca58e00)] Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
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