diff options
| author | Aaron Armstrong Skomra <skomra@gmail.com> | 2017-03-29 10:35:39 -0700 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-03-30 11:30:45 +0200 |
| commit | 8b4073596997f2ccbf68d8e72e07b827388a4536 (patch) | |
| tree | c1c306783346d4ee8e3244480a6a82f3620f4cd6 | |
| parent | 9257821c5a1dc57ef3a37f7cbcebaf548395c964 (diff) | |
| download | linux-8b4073596997f2ccbf68d8e72e07b827388a4536.tar.gz | |
HID: wacom: Don't add ghost interface as shared data
A previous commit (below) adds a check for already probed interfaces to
Wacom's matching heuristic. Unfortunately this causes the Bamboo Pen
(CTL-460) to match itself to its 'ghost' touch interface. After
subsequent changes to the driver this match to the ghost causes the
kernel to crash. This patch avoids calling wacom_add_shared_data()
for the BAMBOO_PEN's ghost touch interface.
Fixes: 41372d5d40e7 ("HID: wacom: Augment 'oVid' and 'oPid' with heuristics for HID_GENERIC")
Cc: stable <stable@vger.kernel.org> # 4.9
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/wacom_sys.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 994bddc55b82..b676f02d4b7f 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -2165,6 +2165,14 @@ static int wacom_parse_and_register(struct wacom *wacom, bool wireless) wacom_update_name(wacom, wireless ? " (WL)" : ""); + /* pen only Bamboo neither support touch nor pad */ + if ((features->type == BAMBOO_PEN) && + ((features->device_type & WACOM_DEVICETYPE_TOUCH) || + (features->device_type & WACOM_DEVICETYPE_PAD))) { + error = -ENODEV; + goto fail; + } + error = wacom_add_shared_data(hdev); if (error) goto fail; @@ -2212,14 +2220,6 @@ static int wacom_parse_and_register(struct wacom *wacom, bool wireless) goto fail_quirks; } - /* pen only Bamboo neither support touch nor pad */ - if ((features->type == BAMBOO_PEN) && - ((features->device_type & WACOM_DEVICETYPE_TOUCH) || - (features->device_type & WACOM_DEVICETYPE_PAD))) { - error = -ENODEV; - goto fail_quirks; - } - if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) error = hid_hw_open(hdev); |