Re: [dpdk-dev] bug in net/ixgbe/ixgbe_ethdev.c:ixgbe_dev_link_update beginning in 17.05-rc3?

["Dai, Wei" <wei.dai@intel.com>]

Yes, it is a bug.
The hw->mac.ops.get_media_type of ixgbe VF is NULL.
I have just submitted a patch to fix it.
http://dpdk.org/dev/patchwork/patch/24188/

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Roger B Melton
> Sent: Wednesday, May 10, 2017 1:53 AM
> To: dev@dpdk.org; laurent.hardy@6wind.com
> Subject: [dpdk-dev] bug in net/ixgbe/ixgbe_ethdev.c:ixgbe_dev_link_update
> beginning in 17.05-rc3?
> 
> After updating to 17.05-rc4 I hit a crash in
> drivers/net/ixgbe/ixgbe_ethdev.c:ixgbe_dev_link_update().  The issue was
> a NULL get_media_type FV for the VF driver.
> 
> Looking at recent commits, I see the following added the
> get_media_type() check:
> 
>     commit c12d22f65b132c56db7b4fdbfd5ddce27d1e9572
>     Author: Laurent Hardy <laurent.hardy@6wind.com>
>     Date:   Thu Apr 27 17:03:42 2017 +0200
> 
>         @@ -3793,6 +3797,14 @@ ixgbe_dev_link_update(struct
> rte_eth_dev
>         *dev, int wait_to_complete)
> 
>                  hw->mac.get_link_status = true;
> 
>         +       if ((intr->flags & IXGBE_FLAG_NEED_LINK_CONFIG) &&
>         +               hw->mac.ops.get_media_type(hw) ==
>         ixgbe_media_type_fiber) {
>         +               speed = hw->phy.autoneg_advertised;
>         +               if (!speed)
>         +                       ixgbe_get_link_capabilities(hw,
> &speed,
>         &autoneg);
>         +               ixgbe_setup_link(hw, speed, true);
>         +       }
>         +
> 
> This is fine for the PF driver, but we shouldn't invoke get_media_type
> for the VF.
> 
> 
> Laurent,
> 
> Is this a bug, or am I missing something?  If it is a bug, what's the
> proper fix?
> 
> Regards,
> Roger
> 
> 
> 
> 
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> 
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