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usbmon: drop bogus 0t from usbmon.txt

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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: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pete Zaitcev 2008-12-04 16:17:00 -07:00 committed by Greg Kroah-Hartman
parent 7c12414955
commit aacf4a0135
1 changed files with 7 additions and 5 deletions
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12
Documentation/usb/usbmon.txt
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@ -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