[dpdk-stable] [PATCH] net/i40e: fix FPK VF overwrite PF RSS LUT

[Wu, Yanglong]

Hi qi,

-----Original Message-----
From: Zhang, Qi Z 
Sent: Monday, January 14, 2019 8:48 PM
To: Wu, Yanglong <yanglong.wu at intel.com>; dev at dpdk.org
Cc: Hall, Ryan E <ryan.e.hall at intel.com>; stable at dpdk.org
Subject: RE: [PATCH] net/i40e: fix FPK VF overwrite PF RSS LUT



> -----Original Message-----
> From: Wu, Yanglong
> Sent: Monday, January 14, 2019 4:24 PM
> To: dev at dpdk.org
> Cc: Hall, Ryan E <ryan.e.hall at intel.com>; Zhang, Qi Z 
> <qi.z.zhang at intel.com>; Wu, Yanglong <yanglong.wu at intel.com>; 
> stable at dpdk.org
> Subject: [PATCH] net/i40e: fix FPK VF overwrite PF RSS LUT

I think this is not a just for FPK, but for all i40e family right?


>From the code, just FPK have this problem.  it not well designed when it transfer to admin queue. 


> 
> i40e_aq_set_rss_lut should set rigister according to the vsi->type. if 
> not, VF may overwrite the rigister of PF
> 
> Fixes: d0a349409bd7 ("i40e: support AQ based RSS config")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Wu Yanglong <yanglong.wu at intel.com>

It should be "Yanglong Wu"



Ok, will send the version two.

> ---
>  drivers/net/i40e/i40e_ethdev.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c 
> b/drivers/net/i40e/i40e_ethdev.c index a6b97e164..d4d99edcd 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -4183,8 +4183,13 @@ i40e_get_rss_lut(struct i40e_vsi *vsi, uint8_t 
> *lut, uint16_t lut_size)
>  		return -EINVAL;
> 
>  	if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
> -		ret = i40e_aq_get_rss_lut(hw, vsi->vsi_id, TRUE,
> -					  lut, lut_size);
> +		if (vsi->type == I40E_VSI_SRIOV) {
> +			ret = i40e_aq_get_rss_lut(hw, vsi->vsi_id, FALSE,
> +						  lut, lut_size);
> +		} else {
> +			ret = i40e_aq_get_rss_lut(hw, vsi->vsi_id, TRUE,
> +						  lut, lut_size);
> +		}

You can simplify above code to below single line

ret = i40e_aq_get_rss_lut(hw, vsi->vsi_id, vsi->type != I40E_VSI_SRIOV, lut, lut_size);


thanks, it would be better.

>  		if (ret) {
>  			PMD_DRV_LOG(ERR, "Failed to get RSS lookup table");
>  			return ret;
> --
> 2.11.0