linux-kernel - [PATCH] mlx5/core: remove mlx5_core_cq.tasklet

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Message-ID: <20241119042448.2473694-1-csander@purestorage.com>
Date: Mon, 18 Nov 2024 21:24:44 -0700
From: Caleb Sander Mateos <csander@...estorage.com>
To: Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>,
	Tariq Toukan <tariqt@...dia.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Caleb Sander Mateos <csander@...estorage.com>,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mlx5/core: remove mlx5_core_cq.tasklet_ctx.priv field

The priv field in mlx5_core_cq's tasklet_ctx struct points to the
mlx5_eq_tasklet tasklet_ctx field of the CQ's mlx5_eq_comp. mlx5_core_cq
already stores a pointer to the EQ. Use this eq pointer to get a pointer
to the tasklet_ctx with no additional pointer dereferences and no void *
casts. Remove the now unused priv field.

Signed-off-by: Caleb Sander Mateos <csander@...estorage.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/cq.c | 5 ++---
 include/linux/mlx5/cq.h                      | 1 -
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cq.c b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
index 1fd403713baf..dc5a291f0993 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cq.c
@@ -68,11 +68,11 @@ void mlx5_cq_tasklet_cb(struct tasklet_struct *t)
 
 static void mlx5_add_cq_to_tasklet(struct mlx5_core_cq *cq,
 				   struct mlx5_eqe *eqe)
 {
 	unsigned long flags;
-	struct mlx5_eq_tasklet *tasklet_ctx = cq->tasklet_ctx.priv;
+	struct mlx5_eq_tasklet *tasklet_ctx = &cq->eq->tasklet_ctx;
 	bool schedule_tasklet = false;
 
 	spin_lock_irqsave(&tasklet_ctx->lock, flags);
 	/* When migrating CQs between EQs will be implemented, please note
 	 * that you need to sync this point. It is possible that
@@ -117,18 +117,17 @@ int mlx5_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 		return err;
 
 	cq->cqn = MLX5_GET(create_cq_out, out, cqn);
 	cq->cons_index = 0;
 	cq->arm_sn     = 0;
+	/* assuming CQ will be deleted before the EQ */
 	cq->eq         = eq;
 	cq->uid = MLX5_GET(create_cq_in, in, uid);
 	refcount_set(&cq->refcount, 1);
 	init_completion(&cq->free);
 	if (!cq->comp)
 		cq->comp = mlx5_add_cq_to_tasklet;
-	/* assuming CQ will be deleted before the EQ */
-	cq->tasklet_ctx.priv = &eq->tasklet_ctx;
 	INIT_LIST_HEAD(&cq->tasklet_ctx.list);
 
 	/* Add to comp EQ CQ tree to recv comp events */
 	err = mlx5_eq_add_cq(&eq->core, cq);
 	if (err)
diff --git a/include/linux/mlx5/cq.h b/include/linux/mlx5/cq.h
index 991526039ccb..cd034ea0ee34 100644
--- a/include/linux/mlx5/cq.h
+++ b/include/linux/mlx5/cq.h
@@ -53,11 +53,10 @@ struct mlx5_core_cq {
 	struct mlx5_rsc_debug	*dbg;
 	int			pid;
 	struct {
 		struct list_head list;
 		void (*comp)(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe);
-		void		*priv;
 	} tasklet_ctx;
 	int			reset_notify_added;
 	struct list_head	reset_notify;
 	struct mlx5_eq_comp	*eq;
 	u16 uid;
-- 
2.45.2