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ice: compress branches in ice_set_features()

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Instead of rather verbose comparison of current netdev->features bits vs
the incoming ones from user, let us compress them by a helper features
set that will be the result of netdev->features XOR features. This way,
current, extensive branches:

	if (features & NETIF_F_BIT && !(netdev->features & NETIF_F_BIT))
		set_feature(true);
	else if (!(features & NETIF_F_BIT) && netdev->features & NETIF_F_BIT)
		set_feature(false);

can become:

	netdev_features_t changed = netdev->features ^ features;

	if (changed & NETIF_F_BIT)
		set_feature(!!(features & NETIF_F_BIT));

This is nothing new as currently several other drivers use this
approach, which I find much more convenient.

Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Maciej Fijalkowski 2022-07-07 12:16:50 +02:00 committed by Tony Nguyen
parent a419526de6
commit c67672fa26
1 changed files with 19 additions and 21 deletions
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38
drivers/net/ethernet/intel/ice/ice_main.c
View File

@ -5918,44 +5918,41 @@ ice_set_vlan_features(struct net_device *netdev, netdev_features_t features)
static int
ice_set_features(struct net_device *netdev, netdev_features_t features)
{
netdev_features_t changed = netdev->features ^ features;
struct ice_netdev_priv *np = netdev_priv(netdev);
struct ice_vsi *vsi = np->vsi;
struct ice_pf *pf = vsi->back;
int ret = 0;
/* Don't set any netdev advanced features with device in Safe Mode */
if (ice_is_safe_mode(vsi->back)) {
dev_err(ice_pf_to_dev(vsi->back), "Device is in Safe Mode - not enabling advanced netdev features\n");
if (ice_is_safe_mode(pf)) {
dev_err(ice_pf_to_dev(pf),
"Device is in Safe Mode - not enabling advanced netdev features\n");
return ret;
}
/* Do not change setting during reset */
if (ice_is_reset_in_progress(pf->state)) {
dev_err(ice_pf_to_dev(vsi->back), "Device is resetting, changing advanced netdev features temporarily unavailable.\n");
dev_err(ice_pf_to_dev(pf),
"Device is resetting, changing advanced netdev features temporarily unavailable.\n");
return -EBUSY;
}
/* Multiple features can be changed in one call so keep features in
* separate if/else statements to guarantee each feature is checked
*/
if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
ice_vsi_manage_rss_lut(vsi, true);
else if (!(features & NETIF_F_RXHASH) &&
netdev->features & NETIF_F_RXHASH)
ice_vsi_manage_rss_lut(vsi, false);
if (changed & NETIF_F_RXHASH)
ice_vsi_manage_rss_lut(vsi, !!(features & NETIF_F_RXHASH));
ret = ice_set_vlan_features(netdev, features);
if (ret)
return ret;
if ((features & NETIF_F_NTUPLE) &&
!(netdev->features & NETIF_F_NTUPLE)) {
ice_vsi_manage_fdir(vsi, true);
ice_init_arfs(vsi);
} else if (!(features & NETIF_F_NTUPLE) &&
(netdev->features & NETIF_F_NTUPLE)) {
ice_vsi_manage_fdir(vsi, false);
ice_clear_arfs(vsi);
if (changed & NETIF_F_NTUPLE) {
bool ena = !!(features & NETIF_F_NTUPLE);
ice_vsi_manage_fdir(vsi, ena);
ena ? ice_init_arfs(vsi) : ice_clear_arfs(vsi);
}
/* don't turn off hw_tc_offload when ADQ is already enabled */
@ -5964,11 +5961,12 @@ ice_set_features(struct net_device *netdev, netdev_features_t features)
return -EACCES;
}
if ((features & NETIF_F_HW_TC) &&
!(netdev->features & NETIF_F_HW_TC))
set_bit(ICE_FLAG_CLS_FLOWER, pf->flags);
else
if (changed & NETIF_F_HW_TC) {
bool ena = !!(features & NETIF_F_HW_TC);
ena ? set_bit(ICE_FLAG_CLS_FLOWER, pf->flags) :
clear_bit(ICE_FLAG_CLS_FLOWER, pf->flags);
}
return 0;
}