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authorAaron Armstrong Skomra <skomra@gmail.com>2017-03-29 20:35:39 +0300
committerJiri Kosina <jkosina@suse.cz>2017-03-30 12:30:45 +0300
commit8b4073596997f2ccbf68d8e72e07b827388a4536 (patch)
treec1c306783346d4ee8e3244480a6a82f3620f4cd6 /drivers/hid/wacom_sys.c
parent9257821c5a1dc57ef3a37f7cbcebaf548395c964 (diff)
downloadlinux-8b4073596997f2ccbf68d8e72e07b827388a4536.tar.xz
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>
Diffstat (limited to 'drivers/hid/wacom_sys.c')
-rw-r--r--drivers/hid/wacom_sys.c16
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);