Date: Wed, 8 Nov 2006 14:43:59 +0100 From: "Attilio Rao" <attilio@freebsd.org> To: "Jacqueline P" <jackie7691@yahoo.com.mx>, freebsd-drivers@freebsd.org Subject: Re: PCCARD - interruptible sleep Message-ID: <3bbf2fe10611080543y61511b96nd49f71985e7cf6d1@mail.gmail.com> In-Reply-To: <20061108103429.24496.qmail@web56014.mail.re3.yahoo.com> References: <20061108103429.24496.qmail@web56014.mail.re3.yahoo.com>
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2006/11/8, Jacqueline P <jackie7691@yahoo.com.mx>:
> 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).
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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