Date: Thu, 16 Nov 2006 10:24:34 -0600 (CST) From: Jacqueline P <jackie7691@yahoo.com.mx> To: Attilio Rao <attilio@freebsd.org>, Warner Losh <imp@bsdimp.com> Cc: freebsd-drivers@freebsd.org, jackie7691@yahoo.com.mx Subject: Re: PCCARD - interruptible sleep Message-ID: <331679.63275.qm@web56013.mail.re3.yahoo.com> In-Reply-To: <3bbf2fe10611081130i1e34ab2end66bf238117cfcf8@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi
so what can I do to get my driver running ?
Actually I have no idea.
Jacqueline
Attilio Rao <attilio@freebsd.org> escribió:
2006/11/8, Warner Losh :
> From: "Attilio Rao"
> Subject: Re: PCCARD - interruptible sleep
> Date: Wed, 8 Nov 2006 14:43:59 +0100
>
> > 2006/11/8, Jacqueline P :
> > > Hi all
> > >
> > > how can I implement an interruptible sleep within my pccard smart card reader driver like ?
> > > For Linux I do this the following way
> > >
> > > // interruptible_pause()
> > > static inline void ipause(unsigned long amount) {
> > > set_current_state(TASK_INTERRUPTIBLE);
> > > schedule_timeout(amount);
> > > }
> > >
> > > and within my driver I use the function DELAY which does a busy wait.
> > >
> > > The problem is, that the driver does not recognize when the pccard is detached during a read / write operation.
> > >
> > > Does the kernel update the struct device_t, so that the driver can use the function device_is_attached() to determine that the device is detached ?
> >
> > You can implement a 'dying' flag in your softc structure (and
> > subsequent macro in order to handle).
>
> But that won't tell you if the hardware has disappeared. Experience
> has shown that dying isn't such a good idea in many cases and tends to
> cause more races than it solves.
Nothing that can't be solved with a softc lock?
Give an example please.
Attilio
--
Peace can only be achieved by understanding - A. Einstein
_______________________________________________
freebsd-drivers@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-drivers
To unsubscribe, send any mail to "freebsd-drivers-unsubscribe@freebsd.org"
---------------------------------
Do You Yahoo!? La mejor conexión a Internet y 2GB extra a tu correo por $100 al mes. http://net.yahoo.com.mx
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?331679.63275.qm>