From: Todd Fujinaka <todd.fujinaka@intel.com>
Date: Thu, 4 Jun 2015 21:26:56 +0000 (-0700)
Subject: igb: report unsupported ethtool settings in set_coalesce
X-Git-Tag: v4.9.8~3644^2~313^2~12
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0c5bbeb8839172990e3b8aa82ae3c166e85a09bc;p=platform%2Fkernel%2Flinux-rpi3.git

igb: report unsupported ethtool settings in set_coalesce

There are many settings possible using ethtool -C/--coalesce, but not
all of them are supported in igb. Report failure when an unsupported
option is set.

Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 109cad9..b7b9c67 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2159,6 +2159,27 @@ static int igb_set_coalesce(struct net_device *netdev,
 	struct igb_adapter *adapter = netdev_priv(netdev);
 	int i;
 
+	if (ec->rx_max_coalesced_frames ||
+	    ec->rx_coalesce_usecs_irq ||
+	    ec->rx_max_coalesced_frames_irq ||
+	    ec->tx_max_coalesced_frames ||
+	    ec->tx_coalesce_usecs_irq ||
+	    ec->stats_block_coalesce_usecs ||
+	    ec->use_adaptive_rx_coalesce ||
+	    ec->use_adaptive_tx_coalesce ||
+	    ec->pkt_rate_low ||
+	    ec->rx_coalesce_usecs_low ||
+	    ec->rx_max_coalesced_frames_low ||
+	    ec->tx_coalesce_usecs_low ||
+	    ec->tx_max_coalesced_frames_low ||
+	    ec->pkt_rate_high ||
+	    ec->rx_coalesce_usecs_high ||
+	    ec->rx_max_coalesced_frames_high ||
+	    ec->tx_coalesce_usecs_high ||
+	    ec->tx_max_coalesced_frames_high ||
+	    ec->rate_sample_interval)
+		return -ENOTSUPP;
+
 	if ((ec->rx_coalesce_usecs > IGB_MAX_ITR_USECS) ||
 	    ((ec->rx_coalesce_usecs > 3) &&
 	     (ec->rx_coalesce_usecs < IGB_MIN_ITR_USECS)) ||