linux-kernel - [PATCH] RDMA: Replace msecs_to_jiffies with secs_to

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Message-ID: <20250326221955611qu6Ix3Pt5WgKvhL6sTySX@zte.com.cn>
Date: Wed, 26 Mar 2025 22:19:55 +0800 (CST)
From: <ye.xingchen@....com.cn>
To: <leon@...nel.org>
Cc: <yishaih@...dia.com>, <jgg@...pe.ca>, <linux-rdma@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] RDMA: Replace msecs_to_jiffies with secs_to_jiffies for timeout

From: Peng Jiang <jiang.peng9@....com.cn>

In drivers/infiniband/hw/mlx4/mcg.c and drivers/infiniband/hw/mlx5/mr.c,
`msecs_to_jiffies` is used to convert milliseconds to jiffies.
For constant milliseconds, using `msecs_to_jiffies` introduces additional
computational overhead. For example, it is unnecessary to check
if m > jiffies_to_msecs(MAX_JIFFY_OFFSET) or (int)m < 0 for constants,
while using `secs_to_jiffies` can avoid these extra calculations.

Signed-off-by: Peng Jiang <jiang.peng9@....com.cn>
Signed-off-by: Ye Xingchen <ye.xingchen@....com.cn>
---
 drivers/infiniband/hw/mlx4/mcg.c | 8 ++++----
 drivers/infiniband/hw/mlx5/mr.c  | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/mcg.c b/drivers/infiniband/hw/mlx4/mcg.c
index 33f525b744f2..e279e69b9a51 100644
--- a/drivers/infiniband/hw/mlx4/mcg.c
+++ b/drivers/infiniband/hw/mlx4/mcg.c
@@ -43,7 +43,7 @@

 #define MAX_VFS		80
 #define MAX_PEND_REQS_PER_FUNC 4
-#define MAD_TIMEOUT_MS	2000
+#define MAD_TIMEOUT_SEC	2

 #define mcg_warn(fmt, arg...)	pr_warn("MCG WARNING: " fmt, ##arg)
 #define mcg_error(fmt, arg...)	pr_err(fmt, ##arg)
@@ -270,7 +270,7 @@ static int send_join_to_wire(struct mcast_group *group, struct ib_sa_mad *sa_mad
 	if (!ret) {
 		/* calls mlx4_ib_mcg_timeout_handler */
 		queue_delayed_work(group->demux->mcg_wq, &group->timeout_work,
-				msecs_to_jiffies(MAD_TIMEOUT_MS));
+				   secs_to_jiffies(MAD_TIMEOUT_SEC));
 	}

 	return ret;
@@ -309,7 +309,7 @@ static int send_leave_to_wire(struct mcast_group *group, u8 join_state)
 	if (!ret) {
 		/* calls mlx4_ib_mcg_timeout_handler */
 		queue_delayed_work(group->demux->mcg_wq, &group->timeout_work,
-				msecs_to_jiffies(MAD_TIMEOUT_MS));
+				   secs_to_jiffies(MAD_TIMEOUT_SEC));
 	}

 	return ret;
@@ -1091,7 +1091,7 @@ static void _mlx4_ib_mcg_port_cleanup(struct mlx4_ib_demux_ctx *ctx, int destroy
 	for (i = 0; i < MAX_VFS; ++i)
 		clean_vf_mcast(ctx, i);

-	end = jiffies + msecs_to_jiffies(MAD_TIMEOUT_MS + 3000);
+	end = jiffies + secs_to_jiffies(MAD_TIMEOUT_SEC + 3);
 	do {
 		count = 0;
 		mutex_lock(&ctx->mcg_table_lock);
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index b7c8c926c578..7943f183267a 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -525,7 +525,7 @@ static void queue_adjust_cache_locked(struct mlx5_cache_ent *ent)
 		ent->fill_to_high_water = false;
 		if (ent->pending)
 			queue_delayed_work(ent->dev->cache.wq, &ent->dwork,
-					   msecs_to_jiffies(1000));
+					   secs_to_jiffies(1));
 		else
 			mod_delayed_work(ent->dev->cache.wq, &ent->dwork, 0);
 	}
@@ -576,7 +576,7 @@ static void __cache_work_func(struct mlx5_cache_ent *ent)
 					"add keys command failed, err %d\n",
 					err);
 				queue_delayed_work(cache->wq, &ent->dwork,
-						   msecs_to_jiffies(1000));
+						   secs_to_jiffies(1));
 			}
 		}
 	} else if (ent->mkeys_queue.ci > 2 * ent->limit) {
@@ -2051,7 +2051,7 @@ static int mlx5_revoke_mr(struct mlx5_ib_mr *mr)
 			ent->in_use--;
 		if (ent->is_tmp && !ent->tmp_cleanup_scheduled) {
 			mod_delayed_work(ent->dev->cache.wq, &ent->dwork,
-					 msecs_to_jiffies(30 * 1000));
+					 secs_to_jiffies(30));
 			ent->tmp_cleanup_scheduled = true;
 		}
 		spin_unlock_irq(&ent->mkeys_queue.lock);
-- 
2.25.1