HID: multitouch: append " Pen" to the name of the stylus input

This is not just cosmetics, it can help to write udev and X.org
rules.

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

1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 099a7ada13c7..55551746d235 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -44,6 +44,7 @@
 #include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/input/mt.h>
+#include <linux/string.h>
 
 
 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
@@ -260,6 +261,14 @@ static struct mt_class mt_classes[] = {
         { }
 };
 
+static void mt_free_input_name(struct hid_input *hi)
+{
+        struct hid_device *hdev = hi->report->device;
+
+        if (hi->input->name != hdev->name)
+                kfree(hi->input->name);
+}
+
 static ssize_t mt_show_quirks(struct device *dev,
                            struct device_attribute *attr,
                            char *buf)
@@ -403,6 +412,12 @@ static void mt_pen_report(struct hid_device *hid, struct hid_report *report)
 static void mt_pen_input_configured(struct hid_device *hdev,
                                         struct hid_input *hi)
 {
+        char *name = kzalloc(strlen(hi->input->name) + 5, GFP_KERNEL);
+        if (name) {
+                sprintf(name, "%s Pen", hi->input->name);
+                mt_free_input_name(hi);
+                hi->input->name = name;
+        }
 }
 
 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
@@ -903,6 +918,10 @@ static void mt_post_parse(struct mt_device *td)
 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 {
         struct mt_device *td = hid_get_drvdata(hdev);
+        char *name = kstrdup(hdev->name, GFP_KERNEL);
+
+        if (name)
+                hi->input->name = name;
 
         if (hi->report->id == td->mt_report_id)
                 mt_touch_input_configured(hdev, hi);
@@ -916,6 +935,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
         int ret, i;
         struct mt_device *td;
         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
+        struct hid_input *hi;
 
         for (i = 0; mt_classes[i].name ; i++) {
                 if (id->driver_data == mt_classes[i].name) {
@@ -966,7 +986,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
         if (ret)
-                goto fail;
+                goto hid_fail;
 
         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 
@@ -978,6 +998,9 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
         return 0;
 
+hid_fail:
+        list_for_each_entry(hi, &hdev->inputs, list)
+                mt_free_input_name(hi);
 fail:
         kfree(td->fields);
         kfree(td);
@@ -1007,8 +1030,14 @@ static int mt_resume(struct hid_device *hdev)
 static void mt_remove(struct hid_device *hdev)
 {
         struct mt_device *td = hid_get_drvdata(hdev);
+        struct hid_input *hi;
+
         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
         hid_hw_stop(hdev);
+
+        list_for_each_entry(hi, &hdev->inputs, list)
+                mt_free_input_name(hi);
+
         kfree(td);
         hid_set_drvdata(hdev, NULL);
 }