From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net,1/2] hyperv: Fix a kernel warning from netvsc_linkstatus_callback() Date: Mon, 08 Apr 2013 12:16:14 -0400 (EDT) Message-ID: <20130408.121614.2170605259377916404.davem@davemloft.net> References: <1365198280-23270-1-git-send-email-haiyangz@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: olaf@aepfle.de, netdev@vger.kernel.org, jasowang@redhat.com, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org To: haiyangz@microsoft.com Return-path: In-Reply-To: <1365198280-23270-1-git-send-email-haiyangz@microsoft.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devel-bounces@linuxdriverproject.org Sender: "devel" List-Id: netdev.vger.kernel.org From: Haiyang Zhang Date: Fri, 5 Apr 2013 14:44:39 -0700 > The warning about local_bh_enable inside IRQ happens when disconnecting a > virtual NIC. > > The reason for the warning is -- netif_tx_disable() is called when the NIC > is disconnected. And it's called within irq context. netif_tx_disable() calls > local_bh_enable() which displays warning if in irq. > > The fix is to remove the unnecessary netif_tx_disable & wake_queue() in the > netvsc_linkstatus_callback(). > > Reported-by: Richard Genoud > Tested-by: Long Li > Tested-by: Richard Genoud > Signed-off-by: Haiyang Zhang > Reviewed-by: K. Y. Srinivasan Applied.