[PATCH] drivers/usb/input: convert to dynamic input_dev allocation

Input: convert drivers/iusb/input to dynamic input_dev allocation

This is required for input_dev sysfs integration

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 37 insertions, 45 deletions

diff --git a/drivers/usb/input/kbtab.c b/drivers/usb/input/kbtab.c
index b6f6ac8d9c2f..a248664b5d1d 100644
--- a/drivers/usb/input/kbtab.c
+++ b/drivers/usb/input/kbtab.c
@@ -34,7 +34,7 @@ MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
 struct kbtab {
         signed char *data;
         dma_addr_t data_dma;
-        struct input_dev dev;
+        struct input_dev *dev;
         struct usb_device *usbdev;
         struct urb *irq;
         int x, y;
@@ -48,7 +48,7 @@ static void kbtab_irq(struct urb *urb, struct pt_regs *regs)
 {
         struct kbtab *kbtab = urb->context;
         unsigned char *data = kbtab->data;
-        struct input_dev *dev = &kbtab->dev;
+        struct input_dev *dev = kbtab->dev;
         int retval;
 
         switch (urb->status) {
@@ -124,53 +124,43 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i
         struct usb_device *dev = interface_to_usbdev(intf);
         struct usb_endpoint_descriptor *endpoint;
         struct kbtab *kbtab;
-        char path[64];
+        struct input_dev *input_dev;
 
-        if (!(kbtab = kmalloc(sizeof(struct kbtab), GFP_KERNEL)))
-                return -ENOMEM;
-        memset(kbtab, 0, sizeof(struct kbtab));
+        kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!kbtab || !input_dev)
+                goto fail1;
 
         kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
-        if (!kbtab->data) {
-                kfree(kbtab);
-                return -ENOMEM;
-        }
+        if (!kbtab->data)
+                goto fail1;
 
         kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
-        if (!kbtab->irq) {
-                usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
-                kfree(kbtab);
-                return -ENOMEM;
-        }
-
-        kbtab->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
-        kbtab->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
-
-        kbtab->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
-
-        kbtab->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
+        if (!kbtab->irq)
+                goto fail2;
 
-        kbtab->dev.mscbit[0] |= BIT(MSC_SERIAL);
-
-        kbtab->dev.absmax[ABS_X] = 0x2000;
-        kbtab->dev.absmax[ABS_Y] = 0x1750;
-        kbtab->dev.absmax[ABS_PRESSURE] = 0xff;
+        kbtab->usbdev = dev;
+        kbtab->dev = input_dev;
 
-        kbtab->dev.absfuzz[ABS_X] = 4;
-        kbtab->dev.absfuzz[ABS_Y] = 4;
+        usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
+        strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
 
-        kbtab->dev.private = kbtab;
-        kbtab->dev.open = kbtab_open;
-        kbtab->dev.close = kbtab_close;
+        input_dev->name = "KB Gear Tablet";
+        input_dev->phys = kbtab->phys;
+        usb_to_input_id(dev, &input_dev->id);
+        input_dev->cdev.dev = &intf->dev;
+        input_dev->private = kbtab;
 
-        usb_make_path(dev, path, 64);
-        sprintf(kbtab->phys, "%s/input0", path);
+        input_dev->open = kbtab_open;
+        input_dev->close = kbtab_close;
 
-        kbtab->dev.name = "KB Gear Tablet";
-        kbtab->dev.phys = kbtab->phys;
-        usb_to_input_id(dev, &kbtab->dev.id);
-        kbtab->dev.dev = &intf->dev;
-        kbtab->usbdev = dev;
+        input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
+        input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
+        input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
+        input_dev->mscbit[0] |= BIT(MSC_SERIAL);
+        input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
+        input_set_abs_params(input_dev, ABS_X, 0, 0x1750, 4, 0);
+        input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
 
         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 
@@ -181,23 +171,25 @@ static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *i
         kbtab->irq->transfer_dma = kbtab->data_dma;
         kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
-        input_register_device(&kbtab->dev);
-
-        printk(KERN_INFO "input: KB Gear Tablet on %s\n",  path);
+        input_register_device(kbtab->dev);
 
         usb_set_intfdata(intf, kbtab);
-
         return 0;
+
+fail2:  usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
+fail1:  input_free_device(input_dev);
+        kfree(kbtab);
+        return -ENOMEM;
 }
 
 static void kbtab_disconnect(struct usb_interface *intf)
 {
-        struct kbtab *kbtab = usb_get_intfdata (intf);
+        struct kbtab *kbtab = usb_get_intfdata(intf);
 
         usb_set_intfdata(intf, NULL);
         if (kbtab) {
                 usb_kill_urb(kbtab->irq);
-                input_unregister_device(&kbtab->dev);
+                input_unregister_device(kbtab->dev);
                 usb_free_urb(kbtab->irq);
                 usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
                 kfree(kbtab);