kernel: linux 2.4.21
usb host: usb-ohci
usbnet: PL2301 or GeneSys GL620USB-A(I test the both)
mainboard: winfast6300
scenerio: (1) plug host-to-host line
(2) ifconfig usb0 up
(3) ifconfig usb0 192.12.10.35
And if you instead, "ifconfig usb0 down" before unplug, what happens? That IS one of the questions I asked.
(4) unplug the line
(5) messages on the screen:
usb-ohci.c SUB .......status:-100(...)
usb-ohci.c RET .......status:-100(...)
usbnet.c status: -100
This is curious, since errno 100 is ENETDOWN which is never returned by "usbnet", "usbcore", or "usb-ohci".
It's as if something is trashing memory for you. Something likely to be unrelated to USB, since I use "usbnet" pretty regularly with OHCI and 2.4.21...
- Dave
(6) machine freeze, means linux can't response any interrupt. The keyboard is dead, ethernet is dead , I must cold boot the machine again.
But under linux 2.4.20 running on the same hardware, there is no such problem.
who know and test as above.
thanks
--- David Brownell <[EMAIL PROTECTED]> wrote:
tu guangxiu wrote:
lists, kernel: linux 2.4.21 I met one severe problem when using usbnet. I unplugged the line made of PL2301, linux got to freeze. I tested it with linux 2.4.20. There was
no
such problem. Please help!
Then please provide more information. Like what host controller driver (uhci, usb-uhci, usb-ohci, etc) you used, was the network link "up" or "down", what kernel log messages came out, what do you mean by "freeze", and so on. The kind of information that is in FAQs on how to report bugs...
What happens when you experiment by changing some of those variables -- switching host controllers (or drivers), doing "ifconfig usb0 down", running wiht (or without) CONFIG_USB_DEBUG enabled, and so on?
- Dave
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