Re: [dpdk-stable] [dpdk-dev] [PATCH] net/ixgbe: fix calling null function of VF

[Gregory Etelson <gregory@weka.io>]

Hello,

The patch you proposed fixed a crash I experienced in IXGBE VF.
However, there's still another crash possibility
if the code will proceed with speed == 0 condition to ixgbe_get_link_capabilities
VF mac.ops.get_link_capabilities is also set to NULL;

Regards,
Gregory


On Wednesday, 10 May 2017 10:00:02 IDT Wei Dai wrote:
> hw->mac.ops.get_media-type() of ixgbe VF is NULL and should not
> be called directly. It had better be replaced by calling
> ixgbe_get_media_type( ) to avoid crash.
> 
> Fixes: c12d22f65b13 ("net/ixgbe: ensure link status is updated")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Wei Dai <wei.dai@intel.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index ec667d8..ed2baec 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -3799,7 +3799,7 @@ 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) {
> +		ixgbe_get_media_type(hw) == ixgbe_media_type_fiber) {
>  		speed = hw->phy.autoneg_advertised;
>  		if (!speed)
>  			ixgbe_get_link_capabilities(hw, &speed, &autoneg);
>