From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Koehrer Mathias (ETAS/ESW5)" Subject: [PATCH] Fix e1000e with Intel 82572EI that has no hardware timestamp support Date: Thu, 7 Aug 2014 06:10:10 +0000 Message-ID: References: <20140806191744.GB6611@netboy> <20140806193211.GC6611@netboy> <20140806195433.GD6611@netboy> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Cc: Sergei Shtylyov , "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" To: Richard Cochran , Nick Krause Return-path: In-Reply-To: <20140806195433.GD6611@netboy> Content-Language: de-DE Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org With the Intel 82527EI (driver: e1000e) there is an issue when running the ptpd2 program, that leads to a kernel oops. The reason is here that in e1000_xmit_frame() a work queue will be scheduled that has not been initialized in this case. The work queue "tx_hwstamp_work" will only be initialized if adapter->flags & FLAG_HAS_HW_TIMESTAMP set. This check is missing in e1000_xmit_frame(). The following patch adds the missing check. Signed-off-by: Mathias Koehrer --- drivers/net/ethernet/intel/e1000e/netdev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) Index: linux-3.12.26/drivers/net/ethernet/intel/e1000e/netdev.c =================================================================== --- linux-3.12.26.orig/drivers/net/ethernet/intel/e1000e/netdev.c 2014-08-04 10:56:56.000000000 +0200 +++ linux-3.12.26/drivers/net/ethernet/intel/e1000e/netdev.c 2014-08-07 08:05:17.000000000 +0200 @@ -5550,7 +5550,8 @@ nr_frags); if (count) { if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && - !adapter->tx_hwtstamp_skb)) { + !adapter->tx_hwtstamp_skb && + (adapter->flags & FLAG_HAS_HW_TIMESTAMP))) { skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; tx_flags |= E1000_TX_FLAGS_HWTSTAMP; adapter->tx_hwtstamp_skb = skb_get(skb); --