Dell supplied me with the following test:

#include<stdio.h>
#include<errno.h>
#include<sys/ioctl.h>
#include<fcntl.h>
#include<linux/usbdevice_fs.h>

main(int argc,char*argv[])
{
   struct usbdevfs_hub_portinfo hubPortInfo = {0};
   struct usbdevfs_ioctl command = {0};
   command.ifno = 0;
   command.ioctl_code = USBDEVFS_HUB_PORTINFO;
   command.data = (void*)&hubPortInfo;
   int fd, ret;
   if(argc != 2) {
     fprintf(stderr,"Usage: %s /proc/bus/usb/<BusNo>/<HubID>\n",argv[0]);
     fprintf(stderr,"Example: %s /proc/bus/usb/001/001\n",argv[0]);
     exit(1);
   }
   errno = 0;
   fd = open(argv[1],O_RDWR);
   if(fd < 0) {
     perror("open failed:");
     exit(errno);
   }
   errno = 0;
   ret = ioctl(fd,USBDEVFS_IOCTL,&command);
   printf("IOCTL return status:%d\n",ret);
   if(ret<0) {
     perror("IOCTL failed:");
     close(fd);
     exit(3);
   } else {
       printf("IOCTL passed:Num of ports %d\n",hubPortInfo.nports);
       close(fd);
       exit(0);
   }
   return 0;
}

I have verified that it breaks if built in 32 bit mode on x86_64 and that
the patch below fixes it.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>