releases/3.1.1/usbmon-vs.-tcpdump-fix-dropped-packet-count.patch

   1 From 236c448cb6e7f82096101e1ace4b77f8b38f82c8 Mon Sep 17 00:00:00 2001
   2 From: Johannes Stezenbach <js@sig21.net>
   3 Date: Thu, 8 Sep 2011 15:39:15 +0200
   4 Subject: usbmon vs. tcpdump: fix dropped packet count
   5
   6 From: Johannes Stezenbach <js@sig21.net>
   7
   8 commit 236c448cb6e7f82096101e1ace4b77f8b38f82c8 upstream.
   9
  10 Report the number of dropped packets instead of zero
  11 when using the binary usbmon interface with tcpdump.
  12
  13 # tcpdump -i usbmon1 -w dump
  14 tcpdump: listening on usbmon1, link-type USB_LINUX_MMAPPED (USB with padded Linux header), capture size 65535 bytes
  15 ^C2155 packets captured
  16 2155 packets received by filter
  17 1019 packets dropped by kernel
  18
  19 Signed-off-by: Johannes Stezenbach <js@sig21.net>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  21
  22 ---
  23  drivers/usb/mon/mon_bin.c |    2 +-
  24  1 file changed, 1 insertion(+), 1 deletion(-)
  25
  26 --- a/drivers/usb/mon/mon_bin.c
  27 +++ b/drivers/usb/mon/mon_bin.c
  28 @@ -1101,7 +1101,7 @@ static long mon_bin_ioctl(struct file *f
  29                 nevents = mon_bin_queued(rp);
  30
  31                 sp = (struct mon_bin_stats __user *)arg;
  32 -               if (put_user(rp->cnt_lost, &sp->dropped))
  33 +               if (put_user(ndropped, &sp->dropped))
  34                         return -EFAULT;
  35                 if (put_user(nevents, &sp->queued))
  36                         return -EFAULT;