USB: usbfs: struct async is a fixed size structure

The ISO descriptors are allocated separately in proc_submiturb for a fetch
from user mode, then tucked at the end of URB. This seems like a dead code.
Signed-off-by: NPete Zaitcev <zaitcev@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/devio.c

@@ -210,9 +210,9 @@ static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, l
 
 static struct async *alloc_async(unsigned int numisoframes)
 {
-        unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
-        struct async *as = kzalloc(assize, GFP_KERNEL);
+	struct async *as;
 
+	as = kzalloc(sizeof(struct async), GFP_KERNEL);
         if (!as)
                 return NULL;
 	as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);