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 <[email protected]> --- 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 2014-08-06 15:15:42.000000000 +0200 @@ -5549,7 +5549,8 @@ count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit, nr_frags); if (count) { - if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && + if ((adapter->flags & FLAG_HAS_HW_TIMESTAMP) && + unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && !adapter->tx_hwtstamp_skb)) { skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; tx_flags |= E1000_TX_FLAGS_HWTSTAMP; --
