From mboxrd@z Thu Jan 1 00:00:00 1970 From: Govindarajulu Varadarajan <_govind@gmx.com> Subject: [PATCH net-next] enic: fix return values in enic_set_coalesce Date: Wed, 2 Jul 2014 15:42:15 +0530 Message-ID: <1404295935-13597-1-git-send-email-_govind@gmx.com> Cc: benve@cisco.com, ssujith@cisco.com, ben@decadent.org.uk, Govindarajulu Varadarajan <_govind@gmx.com> To: davem@davemloft.net, netdev@vger.kernel.org Return-path: Received: from mout.gmx.com ([74.208.4.200]:62438 "EHLO mout.gmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752097AbaGBKNs (ORCPT ); Wed, 2 Jul 2014 06:13:48 -0400 Sender: netdev-owner@vger.kernel.org List-ID: enic_set_coalesce() has two problems. * It should return -EINVAL and not -EOPNOTSUPP for invalid coalesce values. * In case of MSIX, enic_set_coalesce return error after applying requested coalescing setting partially. We should either apply all the setting requeste and return success or apply non and return error. * This patch also simplifies the algo. This was introduced by '7c2ce6e60f703 enic: Add support for adaptive interrupt coalescing' These changes were suggested by Ben Hutchings here http://www.spinics.net/lists/netdev/msg283972.html Also change enic driver version. Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com> --- drivers/net/ethernet/cisco/enic/enic.h | 2 +- drivers/net/ethernet/cisco/enic/enic_ethtool.c | 27 +++++++++++--------------- 2 files changed, 12 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h index c8aa9fb..4ecbbb3 100644 --- a/drivers/net/ethernet/cisco/enic/enic.h +++ b/drivers/net/ethernet/cisco/enic/enic.h @@ -33,7 +33,7 @@ #define DRV_NAME "enic" #define DRV_DESCRIPTION "Cisco VIC Ethernet NIC Driver" -#define DRV_VERSION "2.1.1.50" +#define DRV_VERSION "2.1.1.67" #define DRV_COPYRIGHT "Copyright 2008-2013 Cisco Systems, Inc" #define ENIC_BARS_MAX 6 diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c index 2e50b54..c75f84b 100644 --- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c +++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c @@ -231,7 +231,7 @@ static int enic_set_coalesce(struct net_device *netdev, if (ecmd->use_adaptive_rx_coalesce || ecmd->rx_coalesce_usecs_low || ecmd->rx_coalesce_usecs_high) - return -EOPNOTSUPP; + return -EINVAL; intr = enic_legacy_io_intr(); vnic_intr_coalescing_timer_set(&enic->intr[intr], @@ -243,34 +243,29 @@ static int enic_set_coalesce(struct net_device *netdev, if (ecmd->use_adaptive_rx_coalesce || ecmd->rx_coalesce_usecs_low || ecmd->rx_coalesce_usecs_high) - return -EOPNOTSUPP; + return -EINVAL; vnic_intr_coalescing_timer_set(&enic->intr[0], tx_coalesce_usecs); break; case VNIC_DEV_INTR_MODE_MSIX: + if (ecmd->rx_coalesce_usecs_high && + (rx_coalesce_usecs_high < + rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF)) + return -EINVAL; + for (i = 0; i < enic->wq_count; i++) { intr = enic_msix_wq_intr(enic, i); vnic_intr_coalescing_timer_set(&enic->intr[intr], tx_coalesce_usecs); } - if (rxcoal->use_adaptive_rx_coalesce) { - if (!ecmd->use_adaptive_rx_coalesce) { - rxcoal->use_adaptive_rx_coalesce = 0; - enic_intr_coal_set_rx(enic, rx_coalesce_usecs); - } - } else { - if (ecmd->use_adaptive_rx_coalesce) - rxcoal->use_adaptive_rx_coalesce = 1; - else - enic_intr_coal_set_rx(enic, rx_coalesce_usecs); - } + rxcoal->use_adaptive_rx_coalesce = + !!ecmd->use_adaptive_rx_coalesce; + if (!rxcoal->use_adaptive_rx_coalesce) + enic_intr_coal_set_rx(enic, rx_coalesce_usecs); if (ecmd->rx_coalesce_usecs_high) { - if (rx_coalesce_usecs_high < - (rx_coalesce_usecs_low + ENIC_AIC_LARGE_PKT_DIFF)) - return -EINVAL; rxcoal->range_end = rx_coalesce_usecs_high; rxcoal->small_pkt_range_start = rx_coalesce_usecs_low; rxcoal->large_pkt_range_start = rx_coalesce_usecs_low + -- 2.0.0