ppp_synctty and in_interrupt

Klaus Herb
2002-06-13T14:27:48Z

Hello,
I am currently developing a tty-Driver which is used for synchronous PPP.

System:
Board Special Hardware with a Motorola XPC8260 Microcontroller
OS Elinos V2 with Kernel Version 2.4.3
PPP pppd and ppp Modules Version 2.4.1

The following Problem occurs:

The ppp_synctty ldisc only calls my ttywrite function in interrupt context.
But to avoid a race condition I must include a Semaphore in my ttywrite
function, so I get a Kernel Oops when this Semaphore causes a call to
schedule().

Is there a way to stop this ppp_synctty ldisc from sending in Interrupt
Context?
or
Why does this ldisc only write in interrupt context?

Please CC your replay to klaus.herb@ikon-gmbh.de

Thanks!

Klaus Herb

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Klaus Herb
ikon GmbH
Benzstrasse 17
89079 Ulm
Germany

phone +49/731/94661-0
fax +49/731/94661-61
mailto:klaus.herb@ikon-gmbh.de
http://www.ikon-gmbh.de
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