From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <393FB55F.4CE6988@snmc.com> Date: Thu, 08 Jun 2000 10:01:51 -0500 From: Daris Nevil MIME-Version: 1.0 To: Greg Johnson CC: Linux PPC Mailing List Subject: Re: Task Queues References: <20000608042335.85655415FA@elph.research.canon.com.au> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Greg, Not sure what is going wrong for you, but I can show you what works for me. Somewhere in your device driver data structure (or as a static variable) create a task queue: struct tq_struct bh_tq; In your driver initialization function, initialize the task queue: static void bottom_half_handler(void* dev); bh_tq.routine = bottom_half_hander; bh_tq.data = (void*)dev; // Or pass whatever data structure you will need Then, when you are ready to place your function in the queue: queue_task(&bh_tq, &tq_immediate); mark_bh(IMMEDIATE_BH); // This might be the step you are missing The mark_bh() function sets a flag that tells the scheduler it needs to run the list of functions in the tq_immediate queue. Hope this helps. Regards, Daris Nevil SiSIC Inc/SNMC www.snmc.com Greg Johnson wrote: > Hi All, > > I am trying to create an ISR for our hardware that implements a > "bottom half" interrupt handler. I use a task queue to do this > since our driver is a loadable module. Everything works fine > except that if the task is added to the tq_immediate task queue > it does not seem to run. If I use the tq_scheduler task queue > it works fine. I gather that for bottom halfves that it is > appropriate to schedule them on the immediate queue. > > I have also tried running other tasks that are scheduled elsewhere > in the driver, and have the same problem. > > Thanks > > Greg. > > -- > +------------------------------------------------------+ > | Do you want to know more? www.geocities.com/worfsom/ | > | ..ooOO Greg Johnson OOoo.. | > | HW/SW Engineer gjohnson@research.canon.com.au | > | Canon Information Systems Research Australia (CISRA) | > | 1 Thomas Holt Dr., North Ryde, NSW, 2113, Australia | > | "I FLEXed my BISON and it went YACC!" - me. | > +------------------------------------------------------+ > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/