> From: Intel-wired-lan [intel-wired-lan-boun...@lists.osuosl.org] on behalf of > Cao jin [caoj.f...@cn.fujitsu.com] > Sent: Monday, November 07, 2016 11:06 PM To> : linux-ker...@vger.kernel.org; netdev@vger.kernel.org > Cc: izumi.t...@jp.fujitsu.com; intel-wired-...@lists.osuosl.org > Subject: [Intel-wired-lan] [PATCH] igb: use igb_adapter->io_addr instead of > e1000_hw->hw_addr > > When running as guest, under certain condition, it will oops as following. > writel() in igb_configure_tx_ring() results in oops, because hw->hw_addr > is NULL. While other register access won't oops kernel because they use > wr32/rd32 which have a defense against NULL pointer. > > [ 141.225449] pcieport 0000:00:1c.0: AER: Multiple Uncorrected (Fatal) > error received: id=0101 > [ 141.225523] igb 0000:01:00.1: PCIe Bus Error: > severity=Uncorrected (Fatal), type=Unaccessible, > id=0101(Unregistered Agent ID) > [ 141.299442] igb 0000:01:00.1: broadcast error_detected message > [ 141.300539] igb 0000:01:00.0 enp1s0f0: PCIe link lost, device now > detached > [ 141.351019] igb 0000:01:00.1 enp1s0f1: PCIe link lost, device now > detached > [ 143.465904] pcieport 0000:00:1c.0: Root Port link has been reset > [ 143.465994] igb 0000:01:00.1: broadcast slot_reset message > [ 143.466039] igb 0000:01:00.0: enabling device (0000 -> 0002) > [ 144.389078] igb 0000:01:00.1: enabling device (0000 -> 0002) > [ 145.312078] igb 0000:01:00.1: broadcast resume message > [ 145.322211] BUG: unable to handle kernel paging request at > 0000000000003818 > [ 145.361275] IP: [<ffffffffa02fd38d>] > igb_configure_tx_ring+0x14d/0x280 [igb] > [ 145.400048] PGD 0 > [ 145.438007] Oops: 0002 [#1] SMP > > A similiar issue & solution could be found at: > http://patchwork.ozlabs.org/patch/689592/ > > Signed-off-by: Cao jin <caoj.f...@cn.fujitsu.com> > --- > drivers/net/ethernet/intel/igb/igb_main.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-)
Tested-by: Aaron Brown <aaron.f.br...@intel.com>
