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ethtool: stats: clarify the initialization to ETHTOOL_STAT_NOT_SET 

Ido suggests we add a comment about the init of stats to -1.
This is unlikely to be clear to first time readers.

Suggested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2021-04-19 13:03:45 -07:00 committed by David S. Miller
parent 37434782d6
commit d1f0a5e1fb
1 changed files with 3 additions and 0 deletions
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net/ethtool/stats.c
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@ -114,6 +114,9 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base,
if (ret < 0)
return ret;
/* Mark all stats as unset (see ETHTOOL_STAT_NOT_SET) to prevent them
* from being reported to user space in case driver did not set them.
*/
memset(&data->phy_stats, 0xff, sizeof(data->phy_stats));
memset(&data->mac_stats, 0xff, sizeof(data->mac_stats));
memset(&data->ctrl_stats, 0xff, sizeof(data->mac_stats));