linux-kernel - Re: [PATCH 22/25] usb/at91_udc: don't use [delayed_]work

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Date:	Mon, 7 Jan 2013 17:25:58 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Tejun Heo <tj@...nel.org>
CC:	<linux-kernel@...r.kernel.org>, Andrew Victor <linux@...im.org.za>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Felipe Balbi <balbi@...com>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 22/25] usb/at91_udc: don't use [delayed_]work_pending()

On 12/22/2012 02:57 AM, Tejun Heo :
> There's no need to test whether a (delayed) work item in pending
> before queueing, flushing or cancelling it.  Most uses are unnecessary
> and quite a few of them are buggy.
> 
> Remove unnecessary pending tests from at91_udc.  Only compile tested.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Andrew Victor <linux@...im.org.za>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>

Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>

> Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
> Cc: Felipe Balbi <balbi@...com>
> Cc: linux-usb@...r.kernel.org
> ---
> Please let me know how this patch should be routed.  I can take it
> through the workqueue tree if necessary.
> 
> Thanks.
> 
>  drivers/usb/gadget/at91_udc.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
> index f4a21f6..e81d8a2 100644
> --- a/drivers/usb/gadget/at91_udc.c
> +++ b/drivers/usb/gadget/at91_udc.c
> @@ -1621,8 +1621,7 @@ static void at91_vbus_timer(unsigned long data)
>  	 * bus such as i2c or spi which may sleep, so schedule some work
>  	 * to read the vbus gpio
>  	 */
> -	if (!work_pending(&udc->vbus_timer_work))
> -		schedule_work(&udc->vbus_timer_work);
> +	schedule_work(&udc->vbus_timer_work);
>  }
>  
>  static int at91_start(struct usb_gadget *gadget,
> 


-- 
Nicolas Ferre
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