On Thu, Nov 16, 2023 at 04:21:12PM +0100, Ivan Vecera wrote:
> Add two helpers i40e_(veb|vsi)_get_by_seid() to find corresponding
> VEB or VSI by their SEID value and use these helpers to replace
> existing open-coded loops.
>
> Reviewed-by: Wojciech Drewek <[email protected]>
> Signed-off-by: Ivan Vecera <[email protected]>
Hi Ivan,
some minor feedback from my side.
...
> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h
> b/drivers/net/ethernet/intel/i40e/i40e.h
> index 1e9266de270b..ca8997d29c02 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
> @@ -1360,4 +1360,38 @@ static inline struct i40e_pf *i40e_hw_to_pf(struct
> i40e_hw *hw)
>
> struct device *i40e_hw_to_dev(struct i40e_hw *hw);
>
> +/**
> + * i40e_pf_get_vsi_by_seid - find VSI by SEID
> + * @pf: pointer to a PF
nit: @seid is missing here
> + **/
> +static inline struct i40e_vsi *
> +i40e_pf_get_vsi_by_seid(struct i40e_pf *pf, u16 seid)
> +{
> + struct i40e_vsi *vsi;
> + int i;
> +
> + i40e_pf_for_each_vsi(pf, i, vsi)
> + if (vsi->seid == seid)
> + return vsi;
> +
> + return NULL;
> +}
> +
> +/**
> + * i40e_pf_get_veb_by_seid - find VEB by SEID
> + * @pf: pointer to a PF
Ditto
...
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
...
> @@ -14848,23 +14831,16 @@ struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf,
> u16 flags,
> }
>
> /* make sure there is such a vsi and uplink */
> - i40e_pf_for_each_vsi(pf, vsi_idx, vsi)
> - if (vsi->seid == vsi_seid)
> - break;
> -
> - if (vsi_idx == pf->num_alloc_vsi && vsi_seid != 0) {
> - dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
> - vsi_seid);
> - return NULL;
> + if (vsi_seid) {
> + vsi = i40e_pf_get_vsi_by_seid(pf, vsi_seid);
> + if (!vsi) {
> + dev_err(&pf->pdev->dev, "vsi seid %d not found\n",
> + vsi_seid);
> + return NULL;
> + }
> }
> -
> if (uplink_seid && uplink_seid != pf->mac_seid) {
> - i40e_pf_for_each_veb(pf, veb_idx, veb) {
> - if (veb->seid == uplink_seid) {
> - uplink_veb = veb;
> - break;
> - }
> - }
> + uplink_veb = i40e_pf_get_veb_by_seid(pf, uplink_seid);
> if (!uplink_veb) {
> dev_info(&pf->pdev->dev,
> "uplink seid %d not found\n", uplink_seid);
The next part of this function looks like this:
if (!uplink_veb) {
dev_info(&pf->pdev->dev,
"uplink seid %d not found\n", uplink_seid);
return NULL;
}
}
/* get veb sw struct */
veb_idx = i40e_veb_mem_alloc(pf);
if (veb_idx < 0)
goto err_alloc;
veb = pf->veb[veb_idx];
veb->flags = flags;
veb->uplink_seid = uplink_seid;
veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
/* create the VEB in the switch */
ret = i40e_add_veb(veb, vsi);
Smatch complains that vsi may be used uninitialised here.
Which does seem possible to me if vsi_seid is 0.
...
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