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Commit aacf4a01 authored by Pete Zaitcev's avatar Pete Zaitcev Committed by Greg Kroah-Hartman
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usbmon: drop bogus 0t from usbmon.txt 



The example is incorrect: there is no 0t socket (the '1t' format has no
bus number in it). Also, correct the broken sentence for USB Tag.

Signed-off-by: default avatarPete Zaitcev <zaitcev@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 7c124149

Documentation/usb/usbmon.txt

+7 −5
Original line number Diff line number Diff line
@@ -34,11 +34,12 @@ if usbmon is built into the kernel. 
Verify that bus sockets are present.



# ls /sys/kernel/debug/usbmon

0s  0t  0u  1s  1t  1u  2s  2t  2u  3s  3t  3u  4s  4t  4u

0s  0u  1s  1t  1u  2s  2t  2u  3s  3t  3u  4s  4t  4u

#



Now you can choose to either use the sockets numbered '0' (to capture packets on

all buses), and skip to step #3, or find the bus used by your device with step #2.

Now you can choose to either use the socket '0u' (to capture packets on all

buses), and skip to step #3, or find the bus used by your device with step #2.

This allows to filter away annoying devices that talk continuously.



2. Find which bus connects to the desired device
@@ -99,8 +100,9 @@ on the event type, but there is a set of words, common for all types. 


Here is the list of words, from left to right:



- URB Tag. This is used to identify URBs is normally a kernel mode address

 of the URB structure in hexadecimal.

- URB Tag. This is used to identify URBs, and is normally an in-kernel address

  of the URB structure in hexadecimal, but can be a sequence number or any

  other unique string, within reason.



- Timestamp in microseconds, a decimal number. The timestamp's resolution

  depends on available clock, and so it can be much worse than a microsecond