On 2013/3/29 1:59, Greg KH wrote:
On Thu, Mar 28, 2013 at 01:11:04AM +0800, Lan Tianyu wrote:
Usb port isn't assigned to any bus_type. This seems not good from
Greg's comments.
http://marc.info/?l=linux-usb&m=136200364929942&w=2
This patch is to register usb port to usb_bus_type. The usb port's
original name is "portX". This will cause name confilct after adding
usb port to usb_bus_type since the usb ports with same port num under
different hub have the same name. So change the usb port's name format
to "port + (hub dev name) + '.' + (port num)" for non-root hub and
"port + (usb bus num) + '-' + (port num)" for root hub.
ls /sys/bus/usb/devices
1-0:1.0 2-0:1.0 port1-1 port1-1.3 port2-1.2 port2-2 port4-3
1-1 2-1 port1-1.1 port1-1.4 port2-1.3 port3-1 port4-4
1-1.1 2-1:1.0 port1-1.2 port1-1.5 port2-1.4 port3-2 usb1
1-1:1.0 3-0:1.0 port1-1.2.1 port1-1.6 port2-1.5 port3-3 usb2
1-1.1:1.0 3-1 port1-1.2.2 port1-2 port2-1.6 port3-4 usb3
1-1.2 3-1:1.0 port1-1.2.3 port2-1 port2-1.7 port4-1 usb4
1-1.2:1.0 4-0:1.0 port1-1.2.4 port2-1.1 port2-1.8 port4-2
What does it look like if you reverse the naming scheme (hub dev name +
"port")? Doesn't that show the devices in a bit more logical way?
Hi Greg:
Do you mean e.g "port1.2-1", originally it's "port2-1.1".
2-1 is hub dev name?
If right, how about root hub port and it should be port2.usb1?
thanks,
greg k-h
--
Best Regards
Tianyu Lan
linux kernel enabling team
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