Input: USB devices - handle errors when registering input devices

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/usb/input/acecad.c b/drivers/usb/input/acecad.c
index 909138e5aa04..270bb050879a 100644
--- a/drivers/usb/input/acecad.c
+++ b/drivers/usb/input/acecad.c
@@ -135,6 +135,7 @@ static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_
         struct usb_acecad *acecad;
         struct input_dev *input_dev;
         int pipe, maxp;
+        int err = -ENOMEM;
 
         if (interface->desc.bNumEndpoints != 1)
                 return -ENODEV;
@@ -149,16 +150,22 @@ static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_
 
         acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
         input_dev = input_allocate_device();
-        if (!acecad || !input_dev)
+        if (!acecad || !input_dev) {
+                err = -ENOMEM;
                 goto fail1;
+        }
 
         acecad->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &acecad->data_dma);
-        if (!acecad->data)
+        if (!acecad->data) {
+                err= -ENOMEM;
                 goto fail1;
+        }
 
         acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
-        if (!acecad->irq)
+        if (!acecad->irq) {
+                err = -ENOMEM;
                 goto fail2;
+        }
 
         acecad->usbdev = dev;
         acecad->input = input_dev;
@@ -221,7 +228,9 @@ static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_
         acecad->irq->transfer_dma = acecad->data_dma;
         acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
-        input_register_device(acecad->input);
+        err = input_register_device(acecad->input);
+        if (err)
+                goto fail2;
 
         usb_set_intfdata(intf, acecad);
 
@@ -230,7 +239,7 @@ static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_
  fail2: usb_buffer_free(dev, 8, acecad->data, acecad->data_dma);
  fail1: input_free_device(input_dev);
         kfree(acecad);
-        return -ENOMEM;
+        return err;
 }
 
 static void usb_acecad_disconnect(struct usb_interface *intf)