[Intel-wired-lan] [PATCH] igb: use igb_adapter->io_addr instead of e1000_hw->hw_addr
Brown, Aaron F
aaron.f.brown at intel.com
Wed Nov 23 23:48:52 UTC 2016
> From: Intel-wired-lan [intel-wired-lan-bounces at lists.osuosl.org] on behalf of Cao jin [caoj.fnst at cn.fujitsu.com]
> Sent: Monday, November 07, 2016 11:06 PM
To> : linux-kernel at vger.kernel.org; netdev at vger.kernel.org
> Cc: izumi.taku at jp.fujitsu.com; intel-wired-lan at 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.fnst at 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.brown at intel.com>
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