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Input: elantech - fix detection of touchpad on ASUS s301l

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commit 271329b3c7 upstream.

Adjust Elantech signature validation to account fo rnewer models of
touchpads.

Reported-and-tested-by: Màrius Monton <marius.monton@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede
2014-09-08 14:39:52 -07:00
committed by Greg Kroah-Hartman
parent 13ea4bd23a
commit 9ec354827e
1 changed files with 7 additions and 0 deletions
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7
drivers/input/mouse/elantech.c
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@@ -1223,6 +1223,13 @@ static bool elantech_is_signature_valid(const unsigned char *param)
if (param[1] == 0)
return true;
/*
* Some models have a revision higher then 20. Meaning param[2] may
* be 10 or 20, skip the rates check for these.
*/
if (param[0] == 0x46 && (param[1] & 0xef) == 0x0f && param[2] < 40)
return true;
for (i = 0; i < ARRAY_SIZE(rates); i++)
if (param[2] == rates[i])
return false;