diff options
| author | Michael Chan <michael.chan@broadcom.com> | 2024-01-05 15:54:38 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-01-08 19:15:02 -0800 |
| commit | fd7769798de8a3748c286da65d7e32437f9854bf (patch) | |
| tree | 1a2eb839a940b8aace58639d2829a00fe705037c | |
| parent | 1ef4cacaae2f907db79faea4110ef90545467b7c (diff) | |
| download | linux-fd7769798de8a3748c286da65d7e32437f9854bf.tar.gz | |
bnxt_en: Fix RCU locking for ntuple filters in bnxt_srxclsrldel()
After looking up an ntuple filter from a RCU hash list, the
rcu_read_unlock() call should be made after reading the structure,
or after determining that the filter cannot age out (by aRFS).
The existing code was calling rcu_read_unlock() too early in
bnxt_srxclsrldel().
As suggested by Simon Horman, change the code to handle the error
case of fltr_base not found in the if condition. The code looks
cleaner this way.
Fixes: 8d7ba028aa9a ("bnxt_en: Add support for ntuple filter deletion by ethtool.")
Suggested-by: Simon Horman <horms@kernel.org>
Reported-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/netdev/20240104145955.5a6df702@kernel.org/
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240105235439.28282-3-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index 5629ba9f4b2eea..27b983c0a8a9cd 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -1345,25 +1345,26 @@ static int bnxt_srxclsrldel(struct bnxt *bp, struct ethtool_rxnfc *cmd) { struct ethtool_rx_flow_spec *fs = &cmd->fs; struct bnxt_filter_base *fltr_base; + struct bnxt_ntuple_filter *fltr; rcu_read_lock(); fltr_base = bnxt_get_one_fltr_rcu(bp, bp->ntp_fltr_hash_tbl, BNXT_NTP_FLTR_HASH_SIZE, fs->location); - if (fltr_base) { - struct bnxt_ntuple_filter *fltr; - - fltr = container_of(fltr_base, struct bnxt_ntuple_filter, base); + if (!fltr_base) { rcu_read_unlock(); - if (!(fltr->base.flags & BNXT_ACT_NO_AGING)) - return -EINVAL; - bnxt_hwrm_cfa_ntuple_filter_free(bp, fltr); - bnxt_del_ntp_filter(bp, fltr); - return 0; + return -ENOENT; } + fltr = container_of(fltr_base, struct bnxt_ntuple_filter, base); + if (!(fltr->base.flags & BNXT_ACT_NO_AGING)) { + rcu_read_unlock(); + return -EINVAL; + } rcu_read_unlock(); - return -ENOENT; + bnxt_hwrm_cfa_ntuple_filter_free(bp, fltr); + bnxt_del_ntp_filter(bp, fltr); + return 0; } static u64 get_ethtool_ipv4_rss(struct bnxt *bp) |