| From d8cae98cddd286e38db1724dda1b0e7b467f9237 Mon Sep 17 00:00:00 2001 |
| From: Alan Stern <stern@rowland.harvard.edu> |
| Date: Wed, 4 Jan 2012 16:36:35 -0500 |
| Subject: USB: update documentation for usbmon |
| |
| From: Alan Stern <stern@rowland.harvard.edu> |
| |
| 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| The documentation for usbmon is out of date; the usbfs "devices" file |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> |
| |
| --- |
| Documentation/usb/usbmon.txt | 14 +++++++++----- |
| 1 file changed, 9 insertions(+), 5 deletions(-) |
| |
| --- a/Documentation/usb/usbmon.txt |
| +++ b/Documentation/usb/usbmon.txt |
| @@ -43,10 +43,11 @@ This allows to filter away annoying devi |
| |
| 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' |
| |
