From 4bb073c0e32a0862bdb5215d11af19f6c0180c98 Mon Sep 17 00:00:00 2001 From: David S. Miller Date: Thu, 12 Jun 2008 02:22:02 -0700 Subject: net: Eliminate flush_scheduled_work() calls while RTNL is held. If the RTNL is held when we invoke flush_scheduled_work() we could deadlock. One such case is linkwatch, it is a work struct which tries to grab the RTNL semaphore. The most common case are net driver ->stop() methods. The simplest conversion is to instead use cancel_{delayed_}work_sync() explicitly on the various work struct the driver uses. This is an OK transformation because these work structs are doing things like resetting the chip, restarting link negotiation, and so forth. And if we're bringing down the device, we're about to turn the chip off and reset it anways. So if we cancel a pending work event, that's fine here. Some drivers were working around this deadlock by using a msleep() polling loop of some sort, and those cases are converted to instead use cancel_{delayed_}work_sync() as well. Signed-off-by: David S. Miller --- drivers/net/tulip/tulip_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/tulip') diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c index 55670b5eb611..af8d2c436efd 100644 --- a/drivers/net/tulip/tulip_core.c +++ b/drivers/net/tulip/tulip_core.c @@ -731,7 +731,7 @@ static void tulip_down (struct net_device *dev) void __iomem *ioaddr = tp->base_addr; unsigned long flags; - flush_scheduled_work(); + cancel_work_sync(&tp->media_work); #ifdef CONFIG_TULIP_NAPI napi_disable(&tp->napi); -- cgit v1.2.3-55-g7522