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usbmon vs. tcpdump: fix dropped packet count 

Report the number of dropped packets instead of zero
when using the binary usbmon interface with tcpdump.

# tcpdump -i usbmon1 -w dump
tcpdump: listening on usbmon1, link-type USB_LINUX_MMAPPED (USB with padded Linux header), capture size 65535 bytes
^C2155 packets captured
2155 packets received by filter
1019 packets dropped by kernel

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Johannes Stezenbach 2011-09-08 15:39:15 +02:00 committed by Greg Kroah-Hartman
parent 865569ba5a
commit 236c448cb6
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/mon/mon_bin.c
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@ -1101,7 +1101,7 @@ static long mon_bin_ioctl(struct file *file, unsigned int cmd, unsigned long arg
nevents = mon_bin_queued(rp);
sp = (struct mon_bin_stats __user *)arg;
if (put_user(rp->cnt_lost, &sp->dropped))
if (put_user(ndropped, &sp->dropped))
return -EFAULT;
if (put_user(nevents, &sp->queued))
return -EFAULT;