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Input: alps - fix a mismatch between a condition check and its comment
In the function alps_is_cs19_trackpoint(), we check if the param[1] is
in the 0x20~0x2f range, but the code we wrote for this checking is not
correct:
(param[1] & 0x20) does not mean param[1] is in the range of 0x20~0x2f,
it also means the param[1] is in the range of 0x30~0x3f, 0x60~0x6f...
Now fix it with a new condition checking ((param[1] & 0xf0) == 0x20).
Fixes: 7e4935ccc3
("Input: alps - don't handle ALPS cs19 trackpoint-only device")
Cc: stable@vger.kernel.org
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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@ -2876,7 +2876,7 @@ static bool alps_is_cs19_trackpoint(struct psmouse *psmouse)
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* trackpoint-only devices have their variant_ids equal
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* TP_VARIANT_ALPS and their firmware_ids are in 0x20~0x2f range.
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*/
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return param[0] == TP_VARIANT_ALPS && (param[1] & 0x20);
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return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20);
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}
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static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
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