[S23,v2,05/15] ice: fix set pause param autoneg check
diff mbox series

Message ID 20190628150332.59155-5-anthony.l.nguyen@intel.com
State Superseded
Delegated to: Jeff Kirsher
Headers show
Series
  • [S23,v2,01/15] ice: Implement ethtool ops for channels
Related show

Commit Message

Nguyen, Anthony L June 28, 2019, 3:03 p.m. UTC
From: Paul Greenwalt <paul.greenwalt@intel.com>

When ETHTOOL_GLINKSETTINGS is defined get pause param pause->autoneg
reports SW configured setting, however when not defined get pause param
pause->autoneg reports the link status. Set pause param needs to compare
pause->autoneg with the same source as get pause param to block the user
from changing autoneg with the set pause param option, or the user
may be incorrectly blocked from changing Rx|Tx pause settings.

Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_ethtool.c | 28 +++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

Comments

Bowers, AndrewX July 3, 2019, 6:13 p.m. UTC | #1
> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@osuosl.org] On
> Behalf Of Tony Nguyen
> Sent: Friday, June 28, 2019 8:03 AM
> To: intel-wired-lan@lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH S23 v2 05/15] ice: fix set pause param
> autoneg check
> 
> From: Paul Greenwalt <paul.greenwalt@intel.com>
> 
> When ETHTOOL_GLINKSETTINGS is defined get pause param pause-
> >autoneg reports SW configured setting, however when not defined get
> pause param
> pause->autoneg reports the link status. Set pause param needs to compare
> pause->autoneg with the same source as get pause param to block the user
> from changing autoneg with the set pause param option, or the user may be
> incorrectly blocked from changing Rx|Tx pause settings.
> 
> Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_ethtool.c | 28 +++++++++++++++++++-
>  1 file changed, 27 insertions(+), 1 deletion(-)


Tested-by: Andrew Bowers <andrewx.bowers@intel.com>

Patch
diff mbox series

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 5d540609390b..50f2e0d8dd32 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -2910,6 +2910,7 @@  static int
 ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
 {
 	struct ice_netdev_priv *np = netdev_priv(netdev);
+	struct ice_aqc_get_phy_caps_data *pcaps;
 	struct ice_link_status *hw_link_info;
 	struct ice_pf *pf = np->vsi->back;
 	struct ice_dcbx_cfg *dcbx_cfg;
@@ -2920,6 +2921,7 @@  ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
 	u8 aq_failures;
 	bool link_up;
 	int err = 0;
+	u32 is_an;
 
 	pi = vsi->port_info;
 	hw_link_info = &pi->phy.link_info;
@@ -2934,7 +2936,31 @@  ice_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pause)
 		return -EOPNOTSUPP;
 	}
 
-	if (pause->autoneg != (hw_link_info->an_info & ICE_AQ_AN_COMPLETED)) {
+	/* Get pause param reports configured and negotiated flow control pause
+	 * when ETHTOOL_GLINKSETTINGS is defined. Since ETHTOOL_GLINKSETTINGS is
+	 * defined get pause param pause->autoneg reports SW configured setting,
+	 * so compare pause->autoneg with SW configured to prevent the user from
+	 * using set pause param to chance autoneg.
+	 */
+	pcaps = devm_kzalloc(&vsi->back->pdev->dev, sizeof(*pcaps),
+			     GFP_KERNEL);
+	if (!pcaps)
+		return -ENOMEM;
+
+	/* Get current PHY config */
+	status = ice_aq_get_phy_caps(pi, false, ICE_AQC_REPORT_SW_CFG, pcaps,
+				     NULL);
+	if (status) {
+		devm_kfree(&vsi->back->pdev->dev, pcaps);
+		return -EIO;
+	}
+
+	is_an = ((pcaps->caps & ICE_AQC_PHY_AN_MODE) ?
+			AUTONEG_ENABLE : AUTONEG_DISABLE);
+
+	devm_kfree(&vsi->back->pdev->dev, pcaps);
+
+	if (pause->autoneg != is_an) {
 		netdev_info(netdev, "To change autoneg please use: ethtool -s <dev> autoneg <on|off>\n");
 		return -EOPNOTSUPP;
 	}