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Date:	Mon, 03 Jan 2011 17:38:00 +0100
From:	castet.matthieu@...e.fr
To:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Cc:	stf_xl@...pl, tj@...nel.org

Hi,

could you CC me on ueagle-atm.c patches.

>From what I remind we sleep in the workqueue, that's why we couldn't use the
system one (freeze keyboard...). But may be the code changed.


Matthieu

Tejun Heo a écrit :
> With cmwq, there's no reason to use separate workqueues.  Drop
> uea_softc->work_q and use system_wq instead.  The used work item is
> sync flushed on driver detach.
>
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Stanislaw Gruszka <stf_xl@...pl>
> Cc: linux-usb@...r.kernel.org
> ---
> Only compile tested.  Please feel free to take it into the subsystem
> tree or simply ack - I'll route it through the wq tree.
>
> Thanks.
>
>  drivers/usb/atm/ueagle-atm.c |   19 +++++--------------
>  1 files changed, 5 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
> index 44447f5..55c1d3b 100644
> --- a/drivers/usb/atm/ueagle-atm.c
> +++ b/drivers/usb/atm/ueagle-atm.c
> @@ -168,7 +168,6 @@ struct uea_softc {
>  	union cmv_dsc cmv_dsc;
>
>  	struct work_struct task;
> -	struct workqueue_struct *work_q;
>  	u16 pageno;
>  	u16 ovl;
>
> @@ -1879,7 +1878,7 @@ static int uea_start_reset(struct uea_softc *sc)
>  	/* start loading DSP */
>  	sc->pageno = 0;
>  	sc->ovl = 0;
> -	queue_work(sc->work_q, &sc->task);
> +	schedule_work(&sc->task);
>
>  	/* wait for modem ready CMV */
>  	ret = wait_cmv_ack(sc);
> @@ -2091,14 +2090,14 @@ static void uea_schedule_load_page_e1(struct uea_softc
*sc,
>  {
>  	sc->pageno = intr->e1_bSwapPageNo;
>  	sc->ovl = intr->e1_bOvl >> 4 | intr->e1_bOvl << 4;
> -	queue_work(sc->work_q, &sc->task);
> +	schedule_work(&sc->task);
>  }
>
>  static void uea_schedule_load_page_e4(struct uea_softc *sc,
>  						struct intr_pkt *intr)
>  {
>  	sc->pageno = intr->e4_bSwapPageNo;
> -	queue_work(sc->work_q, &sc->task);
> +	schedule_work(&sc->task);
>  }
>
>  /*
> @@ -2170,13 +2169,6 @@ static int uea_boot(struct uea_softc *sc)
>
>  	init_waitqueue_head(&sc->sync_q);
>
> -	sc->work_q = create_workqueue("ueagle-dsp");
> -	if (!sc->work_q) {
> -		uea_err(INS_TO_USBDEV(sc), "cannot allocate workqueue\n");
> -		uea_leaves(INS_TO_USBDEV(sc));
> -		return -ENOMEM;
> -	}
> -
>  	if (UEA_CHIP_VERSION(sc) == ADI930)
>  		load_XILINX_firmware(sc);
>
> @@ -2222,7 +2214,6 @@ err1:
>  	sc->urb_int = NULL;
>  	kfree(intr);
>  err0:
> -	destroy_workqueue(sc->work_q);
>  	uea_leaves(INS_TO_USBDEV(sc));
>  	return -ENOMEM;
>  }
> @@ -2243,8 +2234,8 @@ static void uea_stop(struct uea_softc *sc)
>  	kfree(sc->urb_int->transfer_buffer);
>  	usb_free_urb(sc->urb_int);
>
> -	/* stop any pending boot process, when no one can schedule work */
> -	destroy_workqueue(sc->work_q);
> +	/* flush the work item, when no one can schedule it */
> +	flush_work_sync(&sc->task);
>
>  	if (sc->dsp_firm)
>  		release_firmware(sc->dsp_firm);

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