[PATCH v2 6/7] HID: multitouch: append " Pen" to the name of the stylus input

[Benjamin Tissoires]

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

Signed-off-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
---
 drivers/hid/hid-multitouch.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 099a7ad..5555174 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 <cha...@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);
 }
-- 
1.8.1.4

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