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i40e: fix condition of WARN_ONCE for stat strings

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Commit 9b10df596b ("i40e: use WARN_ONCE to replace the commented
BUG_ON size check") introduced a warning check to make sure
that the size of the stat strings was always the expected value. This
code accidentally inverted the check of the data pointer. Fix this so
that we accurately count the size of the stats we copied in.

This fixes an erroneous WARN kernel splat that occurs when requesting
ethtool statistics.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Mauro S M Rodrigues <maurosr@linux.vnet.ibm.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2018-08-20 08:12:27 -07:00 committed by Jeff Kirsher
parent fa38e30ac7
commit 07f3701387
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_ethtool.c
View file

@ -2013,7 +2013,7 @@ static void i40e_get_stat_strings(struct net_device *netdev, u8 *data)
for (i = 0; i < I40E_MAX_USER_PRIORITY; i++)
i40e_add_stat_strings(&data, i40e_gstrings_pfc_stats, i);
WARN_ONCE(p - data != i40e_get_stats_count(netdev) * ETH_GSTRING_LEN,
WARN_ONCE(data - p != i40e_get_stats_count(netdev) * ETH_GSTRING_LEN,
"stat strings count mismatch!");
}