diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2012-01-04 16:36:35 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-12 11:40:04 -0800 |
| commit | 7c78b92eecb7ab2740c75dbbe730cdca03947c1a (patch) | |
| tree | dd3d8c750b02e92405b79f874e74948e071da3d3 | |
| parent | 77915669bac49389386caf19b5bc6a6aeddd594a (diff) | |
| download | lwn-7c78b92eecb7ab2740c75dbbe730cdca03947c1a.tar.gz lwn-7c78b92eecb7ab2740c75dbbe730cdca03947c1a.zip | |
USB: update documentation for usbmon
commit d8cae98cddd286e38db1724dda1b0e7b467f9237 upstream.
The documentation for usbmon is out of date; the usbfs "devices" file
now exists in /sys/kernel/debug/usb rather than /proc/bus/usb. This
patch (as1505) updates the documentation accordingly, and also
mentions that the necessary information can be found by running lsusb.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | Documentation/usb/usbmon.txt | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/usb/usbmon.txt b/Documentation/usb/usbmon.txt index 66f92d1194c1..40818fffe9d5 100644 --- a/Documentation/usb/usbmon.txt +++ b/Documentation/usb/usbmon.txt @@ -43,10 +43,11 @@ This allows to filter away annoying devices that talk continuously. 2. Find which bus connects to the desired device -Run "cat /proc/bus/usb/devices", and find the T-line which corresponds to -the device. Usually you do it by looking for the vendor string. If you have -many similar devices, unplug one and compare two /proc/bus/usb/devices outputs. -The T-line will have a bus number. Example: +Run "cat /sys/kernel/debug/usb/devices", and find the T-line which corresponds +to the device. Usually you do it by looking for the vendor string. If you have +many similar devices, unplug one and compare the two +/sys/kernel/debug/usb/devices outputs. The T-line will have a bus number. +Example: T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 @@ -54,7 +55,10 @@ P: Vendor=0557 ProdID=2004 Rev= 1.00 S: Manufacturer=ATEN S: Product=UC100KM V2.00 -Bus=03 means it's bus 3. +"Bus=03" means it's bus 3. Alternatively, you can look at the output from +"lsusb" and get the bus number from the appropriate line. Example: + +Bus 003 Device 002: ID 0557:2004 ATEN UC100KM V2.00 3. Start 'cat' |