[5/6] net/mlx5: fix needless txq initialization check
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Message ID 1590568677-11662-5-git-send-email-michaelba@mellanox.com
State Accepted
Delegated to: Raslan Darawsheh
Headers show
Series
  • [1/6] net/mlx5: fix hairpin Tx queue creation error flow
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Checks

Context Check Description
ci/Intel-compilation fail Compilation issues
ci/checkpatch success coding style OK

Commit Message

Michael Baum May 27, 2020, 8:37 a.m. UTC
The mlx5_txq_obj_new function defines a pointer named txq_data and
assign value into it. After assigning, the code writer is sure that the
variable does not point to NULL and even express it using assertion.

During the function, the function does dereferencing to the pointer
several times and at no point change its value. However, at the end of
the function at the error label when it wants to free one of the fields
of the structure that txq_data points to, it checks again whether
txq_data is invalid.
This check is unnecessary since it knows for sure that txq_data is
valid.

Remove the aforementioned needless check.

Fixes: 644906881881 ("net/mlx5: add free on completion queue")
Cc: stable@dpdk.org

Signed-off-by: Michael Baum <michaelba@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
---
 drivers/net/mlx5/mlx5_txq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index 7cc620a..80d99ff 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -793,7 +793,7 @@  struct mlx5_txq_obj *
 		claim_zero(mlx5_glue->destroy_cq(tmpl.cq));
 	if (tmpl.qp)
 		claim_zero(mlx5_glue->destroy_qp(tmpl.qp));
-	if (txq_data && txq_data->fcqs)
+	if (txq_data->fcqs)
 		rte_free(txq_data->fcqs);
 	if (txq_obj)
 		rte_free(txq_obj);