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SubjectRe: 2.5.5-pre1 rmmod usb-uhci hangs
Greg KH wrote:
> On Fri, Feb 15, 2002 at 03:54:40PM +0100, Pierre Rousselet wrote:
>
>>with 2.5.5-pre1 usb-uhci module can't unload. rmmod hangs, leaving the
>>system unstable. in one circumstance the box freezed with an oops
>>involving swapper pid0 . this doesn't happen with 2.5.4
>>
>
> Try this (untested, I haven't rebooted yet) patch:
>
> thanks,
>
> greg k-h
>
>
> diff -Nru a/drivers/usb/usb.c b/drivers/usb/usb.c
> --- a/drivers/usb/usb.c Thu Feb 14 22:47:21 2002
> +++ b/drivers/usb/usb.c Thu Feb 14 22:47:21 2002
> @@ -1979,11 +1979,11 @@
> if (driver->owner)
> __MOD_DEC_USE_COUNT(driver->owner);
> /* if driver->disconnect didn't release the interface */
> - if (interface->driver) {
> - put_device (&interface->dev);
> + if (interface->driver)
> usb_driver_release_interface(driver, interface);
> - }
> }
> + /* remove our device node for this interface */
> + put_device(&interface->dev);
> }
> }
>
>
>
no, it doesn't solve the problem. i would like to test it whith
preemtible kernel not set but it doesn't boot.

with both 2.5.4 and 2.5.5-pre1 when loading usb-uhci usb.c reports 2
devices :
device 1 : USB UHCI Root Hub
device 2 : Alcatel Speed Touch USB (the driver module and firmware are
not loaded at this stage)

when rmmoding usb-uhci with 2.5.4 usb.c reports:
usb.c: USB disconnect on device 1
usb.c: USB disconnect on device 2

with 2.5.5-pre1
usb.c: USB disconnect on device 1
and nothing else.
Pierre
--
------------------------------------------------
Pierre Rousselet <pierre.rousselet@wanadoo.fr>
------------------------------------------------
-
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