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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. Verify that bus sockets are present.
# ls /sys/kernel/debug/usbmon # 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 Now you can choose to either use the socket '0u' (to capture packets on all
all buses), and skip to step #3, or find the bus used by your device with step #2. 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 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: Here is the list of words, from left to right:
- URB Tag. This is used to identify URBs is normally a kernel mode address - URB Tag. This is used to identify URBs, and is normally an in-kernel address
of the URB structure in hexadecimal. 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 - Timestamp in microseconds, a decimal number. The timestamp's resolution
depends on available clock, and so it can be much worse than a microsecond depends on available clock, and so it can be much worse than a microsecond