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| author | Govindarajulu Varadarajan <_govind@gmx.com> | 2015-06-11 11:52:55 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-10 23:42:39 -0700 |
| commit | 19b596bda1c5400808635fde0d521c1f89a6c1a3 (patch) | |
| tree | 5484ba980423c60c8f684cc681d9c76883fe11ff /drivers/net/ethernet/cisco | |
| parent | 6286e8285078ab02b215bba1d42a05ecfd864515 (diff) | |
| download | linux-19b596bda1c5400808635fde0d521c1f89a6c1a3.tar.gz linux-19b596bda1c5400808635fde0d521c1f89a6c1a3.tar.bz2 linux-19b596bda1c5400808635fde0d521c1f89a6c1a3.zip | |
enic: check return value for stat dump
We do not check the return value of enic_dev_stats_dump(). If allocation
fails, we will hit NULL pointer reference.
Return only if memory allocation fails. For other failures, we return the
previously recorded values.
Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cisco')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_ethtool.c | 20 | ||||
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_main.c | 9 |
2 files changed, 25 insertions, 4 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c index 28d9ca675a27..68d47b196dae 100644 --- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c +++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c @@ -131,8 +131,15 @@ static void enic_get_drvinfo(struct net_device *netdev, { struct enic *enic = netdev_priv(netdev); struct vnic_devcmd_fw_info *fw_info; + int err; - enic_dev_fw_info(enic, &fw_info); + err = enic_dev_fw_info(enic, &fw_info); + /* return only when pci_zalloc_consistent fails in vnic_dev_fw_info + * For other failures, like devcmd failure, we return previously + * recorded info. + */ + if (err == -ENOMEM) + return; strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); @@ -181,8 +188,15 @@ static void enic_get_ethtool_stats(struct net_device *netdev, struct enic *enic = netdev_priv(netdev); struct vnic_stats *vstats; unsigned int i; - - enic_dev_stats_dump(enic, &vstats); + int err; + + err = enic_dev_stats_dump(enic, &vstats); + /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump + * For other failures, like devcmd failure, we return previously + * recorded stats. + */ + if (err == -ENOMEM) + return; for (i = 0; i < enic_n_tx_stats; i++) *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].index]; diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index 0e5a01dd7545..eadae1b412c6 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -615,8 +615,15 @@ static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, { struct enic *enic = netdev_priv(netdev); struct vnic_stats *stats; + int err; - enic_dev_stats_dump(enic, &stats); + err = enic_dev_stats_dump(enic, &stats); + /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump + * For other failures, like devcmd failure, we return previously + * recorded stats. + */ + if (err == -ENOMEM) + return net_stats; net_stats->tx_packets = stats->tx.tx_frames_ok; net_stats->tx_bytes = stats->tx.tx_bytes_ok; |