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enic: fix return values in enic_set_coalesce

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Govindarajulu Varadarajan 2014-07-02 15:42:15 +05:30 committed by David S. Miller
parent e721f87d80
commit a16a336192
2 changed files with 12 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/cisco/enic/enic.h
View File

@ -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

27
drivers/net/ethernet/cisco/enic/enic_ethtool.c
View File

@ -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 +