linux-kernel - [PATCH 5/5] staging: hv: fix a kernel warning in netvsc_linkstatus

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Date:	Fri, 17 Jun 2011 07:58:08 -0700
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	haiyangz@...rosoft.com, hjanssen@...rosoft.com, kys@...rosoft.com,
	v-abkane@...rosoft.com, gregkh@...e.de,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	virtualization@...ts.osdl.org
Cc:	stable <stable@...nel.org>
Subject: [PATCH 5/5] staging: hv: fix a kernel warning in netvsc_linkstatus_callback()

netif_notify_peers() is not allowed in netvsc_linkstatus_callback() on some
distros, because netvsc_linkstatus_callback() is within IRQ context. So we
move the first call to netif_notify_peers() into queued work as well, but with
zero delay.

This should also be back-ported to stable kernels 2.6.32 and later.

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Cc: stable <stable@...nel.org>
---
 drivers/staging/hv/netvsc_drv.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index c9ed19a..2299b88 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -216,8 +216,8 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
 	if (status == 1) {
 		netif_carrier_on(net);
 		netif_wake_queue(net);
-		netif_notify_peers(net);
 		ndev_ctx = netdev_priv(net);
+		schedule_delayed_work(&ndev_ctx->dwork, 0);
 		schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20));
 	} else {
 		netif_carrier_off(net);
-- 
1.6.3.2

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