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HID: multitouch: do not blindly set EV_KEY or EV_ABS bits 

Now that input core insists on having dev->absinfo when device claims to
generate EV_ABS in its dev->evbit, we should not be blindly setting that
bit.

The code in question might have been needed before input_set_abs_params()
started setting EV_ABS in device's evbit, but not anymore, and is now
breaking devices such as SMART SPNL-6075 Touchscreen.

Fixes: 6ecfe51b40 ("Input: refuse to register absolute devices ...")
Reported-by: Matthias Fend <Matthias.Fend@wolfvision.net>
Tested-by: Matthias Fend <Matthias.Fend@wolfvision.net>
Cc: stable@vger.kernel.org
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
hifive-unleashed-5.1
Dmitry Torokhov 2017-07-11 10:02:18 -07:00 committed by Jiri Kosina
parent a91ab911df
commit 4cf56a89c6
1 changed files with 4 additions and 12 deletions
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16
drivers/hid/hid-multitouch.c
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@ -620,16 +620,6 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
return 0;
}
static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if (usage->type == EV_KEY || usage->type == EV_ABS)
set_bit(usage->type, hi->input->evbit);
return -1;
}
static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
{
__s32 quirks = td->mtclass.quirks;
@ -969,8 +959,10 @@ static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
return 0;
if (field->application == HID_DG_TOUCHSCREEN ||
field->application == HID_DG_TOUCHPAD)
return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
field->application == HID_DG_TOUCHPAD) {
/* We own these mappings, tell hid-input to ignore them */
return -1;
}
/* let hid-core decide for the others */
return 0;