On Thu, May 27, 2004 at 05:38:32PM +0200, Oliver Neukum wrote:
> Am Donnerstag, 27. Mai 2004 12:00 schrieb Andrew Morton:
> > Trace; c28013a4 <[usbcore]usb_control_msg+70/8c>
> > Trace; c281f121 <[pl2303]set_control_lines+35/64>
> > Trace; c2820039 <[pl2303]set_modem_info+ed/100>
> > Trace; c2820260 <[pl2303]pl2303_ioctl+c0/120>
> > Trace; c2819a70 <[usbserial]serial_ioctl+e4/108>
> > Trace; c2845fcf <[irlan]irlan_close_data_channel+e3/118>
> > Trace; c2848394 <[irlan]irlan_client_get_value_confirm+e8/104>
> > Trace; c2833c77 <[irda]irda_task_kick+73/14c>
> > Trace; c2833de4 <[irda]irda_task_timer_expired+0/2c>
> > Trace; c2833e0b <[irda]irda_task_timer_expired+27/2c>
> > Trace; c011c3f8 <timer_bh+278/388>
>
> It changes modem control lines from a timer. Is that legal?
We went over that in lot's of details a few month ago with
Russell King. Let's just say that it's not something that can be
quickly and simply fixed, as you can't create a process context out of
thin air. Moreover, this is not the only issue, there are other issues
with the tty API...
In 2.6.X, Martin has introduced a new model and new API for
dongle drivers, which fixes all those issues. Both irtty and the
various dongle drivers have been successfully ported to this new API,
the old irtty removed and the old dongle drivers deprecated. So, this
is fully fixed in 2.6.X.
Back to 2.4.X : 2.4.X is a stable kernel, so I'm not going to
introduce any architectural changes. As the issue occur only when
using USB-serial converter (which is rare), and things are solid when
using a real UART, I'm not going to worry about it, and will advise
the handful of people affected to upgrade to 2.6.X.
> Regards
> Oliver
Have fun...
Jean
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