HID: multitouch: simplify the application retrieval

Now that the application is simply stored in struct hid_input, we can
overwrite it in mt_input_mapping() for the faulty egalax and have a
simpler suffix processing in mt_input_configured()

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index da954f3..f7c6de2 100644 (file)
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1319,6 +1319,13 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
                return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
                                              application);
 
+       /*
+        * some egalax touchscreens have "application == DG_TOUCHSCREEN"
+        * for the stylus. Overwrite the hid_input application
+        */
+       if (field->physical == HID_DG_STYLUS)
+               hi->application = HID_DG_STYLUS;
+
        /* let hid-core decide for the others */
        return 0;
 }
@@ -1507,14 +1514,12 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
        struct mt_device *td = hid_get_drvdata(hdev);
        char *name;
        const char *suffix = NULL;
-       unsigned int application = 0;
        struct mt_report_data *rdata;
        struct mt_application *mt_application = NULL;
        struct hid_report *report;
        int ret;
 
        list_for_each_entry(report, &hi->reports, hidinput_list) {
-               application = report->application;
                rdata = mt_find_report_data(td, report);
                if (!rdata) {
                        hid_err(hdev, "failed to allocate data for report\n");
@@ -1529,46 +1534,33 @@ static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
                        if (ret)
                                return ret;
                }
-
-               /*
-                * some egalax touchscreens have "application == DG_TOUCHSCREEN"
-                * for the stylus. Check this first, and then rely on
-                * the application field.
-                */
-               if (report->field[0]->physical == HID_DG_STYLUS) {
-                       suffix = "Pen";
-                       /* force BTN_STYLUS to allow tablet matching in udev */
-                       __set_bit(BTN_STYLUS, hi->input->keybit);
-               }
        }
 
-       if (!suffix) {
-               switch (application) {
-               case HID_GD_KEYBOARD:
-               case HID_GD_KEYPAD:
-               case HID_GD_MOUSE:
-               case HID_DG_TOUCHPAD:
-               case HID_GD_SYSTEM_CONTROL:
-               case HID_CP_CONSUMER_CONTROL:
-               case HID_GD_WIRELESS_RADIO_CTLS:
-               case HID_GD_SYSTEM_MULTIAXIS:
-                       /* already handled by hid core */
-                       break;
-               case HID_DG_TOUCHSCREEN:
-                       /* we do not set suffix = "Touchscreen" */
-                       hi->input->name = hdev->name;
-                       break;
-               case HID_DG_STYLUS:
-                       /* force BTN_STYLUS to allow tablet matching in udev */
-                       __set_bit(BTN_STYLUS, hi->input->keybit);
-                       break;
-               case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
-                       suffix = "Custom Media Keys";
-                       break;
-               default:
-                       suffix = "UNKNOWN";
-                       break;
-               }
+       switch (hi->application) {
+       case HID_GD_KEYBOARD:
+       case HID_GD_KEYPAD:
+       case HID_GD_MOUSE:
+       case HID_DG_TOUCHPAD:
+       case HID_GD_SYSTEM_CONTROL:
+       case HID_CP_CONSUMER_CONTROL:
+       case HID_GD_WIRELESS_RADIO_CTLS:
+       case HID_GD_SYSTEM_MULTIAXIS:
+               /* already handled by hid core */
+               break;
+       case HID_DG_TOUCHSCREEN:
+               /* we do not set suffix = "Touchscreen" */
+               hi->input->name = hdev->name;
+               break;
+       case HID_DG_STYLUS:
+               /* force BTN_STYLUS to allow tablet matching in udev */
+               __set_bit(BTN_STYLUS, hi->input->keybit);
+               break;
+       case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
+               suffix = "Custom Media Keys";
+               break;
+       default:
+               suffix = "UNKNOWN";
+               break;
        }
 
        if (suffix) {