Hello,
I just programmed a new driver for a USB ISDN TA.
I tested it with kernel versions 2.2.19 and 2.4.5 8uhci and ohci configs.
Unfortunately some other persons testing the driver too reported that when
using the alternate JE uhci driver with 2.4.5 the machine hangs when the
driver is loade and a device is connected.
Regarding 2.2.19 and 2.4.5 (uhci non je and ohci) no problems occured.
Does anybody know what is the difference when using the uhci je driver
instead of the standard uhci version ?
There seems to be a difference between 2.2.19 and 2.4.5, too.
As I recognized 2.2.19 drivers leave the input fields of the urb untouched,
2.4.5 modifies the dev field for example. But even with the needed changes in
my driver the problem still exists on the remote machine.
What could be the reason ?
Is it necessary to refill ALL fields of an Bulk or control urb when reusing
it ? As for interrupt urbs (in endpoints) the urb is automatically
rescheduled itself I assume not to need any changes in the completion handler
? Or is this wrong, too ?
Are there any other differences between JE and non JE version or should one
of them prefered for special devices ?
Werner
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