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    Subject[PATCH 4.19 59/98] HID: wacom: correct misreported EKR ring values
    Date
    From: Aaron Armstrong Skomra <skomra@gmail.com>

    commit fcf887e7caaa813eea821d11bf2b7619a37df37a upstream.

    The EKR ring claims a range of 0 to 71 but actually reports
    values 1 to 72. The ring is used in relative mode so this
    change should not affect users.

    Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
    Fixes: 72b236d60218f ("HID: wacom: Add support for Express Key Remote.")
    Cc: <stable@vger.kernel.org> # v4.3+
    Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
    Reviewed-by: Jason Gerecke <jason.gerecke@wacom.com>
    Signed-off-by: Jiri Kosina <jkosina@suse.cz>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/hid/wacom_wac.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/hid/wacom_wac.c
    +++ b/drivers/hid/wacom_wac.c
    @@ -1061,7 +1061,7 @@ static int wacom_remote_irq(struct wacom
    input_report_key(input, BTN_BASE2, (data[11] & 0x02));

    if (data[12] & 0x80)
    - input_report_abs(input, ABS_WHEEL, (data[12] & 0x7f));
    + input_report_abs(input, ABS_WHEEL, (data[12] & 0x7f) - 1);
    else
    input_report_abs(input, ABS_WHEEL, 0);


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