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Date: Fri, 22 Jul 2011 17:16:42 -0700 (PDT) From: David Miller <davem@...emloft.net> To: shemminger@...tta.com Cc: romieu@...zoreil.com, greearb@...delatech.com, torvalds@...ux-foundation.org, david@...olicited.net, tj@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH] net: allow netif_carrier to be called safely from IRQ From: Stephen Hemminger <shemminger@...tta.com> Date: Fri, 22 Jul 2011 15:53:56 -0700 > As reported by Ben Greer and Froncois Romieu. The code path in > the netif_carrier code leads it to try and disable > a late workqueue to reenable it immediately > netif_carrier_on > -> linkwatch_fire_event > -> linkwatch_schedule_work > -> cancel_delayed_work > -> del_timer_sync > > If __cancel_delayed_work is used instead then there is no > problem of waiting for running linkwatch_event. > > There is a race between linkwatch_event running re-scheduling > but it is harmless to schedule an extra scan of the linkwatch queue. > > Signed-off-by: Stephen Hemminger <shemminger@...tta.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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