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Subject[PATCH AUTOSEL 5.16 191/217] net/mlx5: DR, Fix error flow in creating matcher
Date
From: Yevgeny Kliteynik <kliteyn@nvidia.com>

[ Upstream commit 84dfac39c61fde04126e23723138128b50cd036f ]

The error code of nic matcher init functions wasn't checked.
This patch improves the matcher init function and fix error flow bug:
the handling of match parameter is moved into a separate function
and error flow is simplified.

Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../mellanox/mlx5/core/steering/dr_matcher.c | 53 +++++++++++--------
1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c
index 793365242e852..3d0cdc36a91ab 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c
@@ -872,13 +872,12 @@ static int dr_matcher_init_fdb(struct mlx5dr_matcher *matcher)
return ret;
}

-static int dr_matcher_init(struct mlx5dr_matcher *matcher,
- struct mlx5dr_match_parameters *mask)
+static int dr_matcher_copy_param(struct mlx5dr_matcher *matcher,
+ struct mlx5dr_match_parameters *mask)
{
+ struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_match_parameters consumed_mask;
- struct mlx5dr_table *tbl = matcher->tbl;
- struct mlx5dr_domain *dmn = tbl->dmn;
- int i, ret;
+ int i, ret = 0;

if (matcher->match_criteria >= DR_MATCHER_CRITERIA_MAX) {
mlx5dr_err(dmn, "Invalid match criteria attribute\n");
@@ -898,10 +897,36 @@ static int dr_matcher_init(struct mlx5dr_matcher *matcher,
consumed_mask.match_sz = mask->match_sz;
memcpy(consumed_mask.match_buf, mask->match_buf, mask->match_sz);
mlx5dr_ste_copy_param(matcher->match_criteria,
- &matcher->mask, &consumed_mask,
- true);
+ &matcher->mask, &consumed_mask, true);
+
+ /* Check that all mask data was consumed */
+ for (i = 0; i < consumed_mask.match_sz; i++) {
+ if (!((u8 *)consumed_mask.match_buf)[i])
+ continue;
+
+ mlx5dr_dbg(dmn,
+ "Match param mask contains unsupported parameters\n");
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ kfree(consumed_mask.match_buf);
}

+ return ret;
+}
+
+static int dr_matcher_init(struct mlx5dr_matcher *matcher,
+ struct mlx5dr_match_parameters *mask)
+{
+ struct mlx5dr_table *tbl = matcher->tbl;
+ struct mlx5dr_domain *dmn = tbl->dmn;
+ int ret;
+
+ ret = dr_matcher_copy_param(matcher, mask);
+ if (ret)
+ return ret;
+
switch (dmn->type) {
case MLX5DR_DOMAIN_TYPE_NIC_RX:
matcher->rx.nic_tbl = &tbl->rx;
@@ -919,22 +944,8 @@ static int dr_matcher_init(struct mlx5dr_matcher *matcher,
default:
WARN_ON(true);
ret = -EINVAL;
- goto free_consumed_mask;
- }
-
- /* Check that all mask data was consumed */
- for (i = 0; i < consumed_mask.match_sz; i++) {
- if (!((u8 *)consumed_mask.match_buf)[i])
- continue;
-
- mlx5dr_dbg(dmn, "Match param mask contains unsupported parameters\n");
- ret = -EOPNOTSUPP;
- goto free_consumed_mask;
}

- ret = 0;
-free_consumed_mask:
- kfree(consumed_mask.match_buf);
return ret;
}

--
2.34.1
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