diff options
| author | Stefan Assmann <sassmann@kpanic.de> | 2021-08-04 11:22:24 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-08-17 19:45:45 +0300 |
| commit | 5ac49f3c2702f269d31cc37eb9308bc557953c4d (patch) | |
| tree | 37ab0e415b57bf38074d592906caea0d16f448df /drivers/net/ethernet/intel/iavf/iavf_ethtool.c | |
| parent | 752be2976405b7499890c0b6bac6d30d34d08bd6 (diff) | |
| download | linux-5ac49f3c2702f269d31cc37eb9308bc557953c4d.tar.xz | |
iavf: use mutexes for locking of critical sections
As follow-up to the discussion with Jakub Kicinski about iavf locking
being insufficient [1] convert iavf to use mutexes instead of bitops.
The locking logic is kept as is, just a drop-in replacement of
enum iavf_critical_section_t with separate mutexes.
The only difference is that the mutexes will be destroyed before the
module is unloaded.
[1] https://lwn.net/ml/netdev/20210316150210.00007249%40intel.com/
Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Marek Szlosek <marek.szlosek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/iavf/iavf_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/intel/iavf/iavf_ethtool.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c index af43fbd8cb75..edbeb27213f8 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c +++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c @@ -1352,8 +1352,7 @@ static int iavf_add_fdir_ethtool(struct iavf_adapter *adapter, struct ethtool_rx if (!fltr) return -ENOMEM; - while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK, - &adapter->crit_section)) { + while (!mutex_trylock(&adapter->crit_lock)) { if (--count == 0) { kfree(fltr); return -EINVAL; @@ -1378,7 +1377,7 @@ ret: if (err && fltr) kfree(fltr); - clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section); + mutex_unlock(&adapter->crit_lock); return err; } @@ -1563,8 +1562,7 @@ iavf_set_adv_rss_hash_opt(struct iavf_adapter *adapter, return -EINVAL; } - while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK, - &adapter->crit_section)) { + while (!mutex_trylock(&adapter->crit_lock)) { if (--count == 0) { kfree(rss_new); return -EINVAL; @@ -1600,7 +1598,7 @@ iavf_set_adv_rss_hash_opt(struct iavf_adapter *adapter, if (!err) mod_delayed_work(iavf_wq, &adapter->watchdog_task, 0); - clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section); + mutex_unlock(&adapter->crit_lock); if (!rss_new_add) kfree(rss_new); |