linux-kernel - [PATCH] block: move from strlcpy with unused retval to strscpy

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Date:   Thu, 18 Aug 2022 22:59:52 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-kernel@...r.kernel.org
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org
Subject: [PATCH] block: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 block/blk-cgroup-fc-appid.c | 2 +-
 block/elevator.c            | 2 +-
 block/genhd.c               | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/blk-cgroup-fc-appid.c b/block/blk-cgroup-fc-appid.c
index 760a2e1878dd..6117bc045a2c 100644
--- a/block/blk-cgroup-fc-appid.c
+++ b/block/blk-cgroup-fc-appid.c
@@ -34,7 +34,7 @@ int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len)
 	 * the vmid from the fabric.
 	 * Adding the overhead of a lock is not necessary.
 	 */
-	strlcpy(blkcg->fc_app_id, app_id, app_id_len);
+	strscpy(blkcg->fc_app_id, app_id, app_id_len);
 	css_put(css);
 out_cgrp_put:
 	cgroup_put(cgrp);
diff --git a/block/elevator.c b/block/elevator.c
index c319765892bb..d5bc81d70cbb 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -761,7 +761,7 @@ static int __elevator_change(struct request_queue *q, const char *name)
 		return elevator_switch(q, NULL);
 	}
 
-	strlcpy(elevator_name, name, sizeof(elevator_name));
+	strscpy(elevator_name, name, sizeof(elevator_name));
 	e = elevator_get(q, strstrip(elevator_name), true);
 	if (!e)
 		return -EINVAL;
diff --git a/block/genhd.c b/block/genhd.c
index d36fabf0abc1..a23993cdf1b4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -258,7 +258,7 @@ int __register_blkdev(unsigned int major, const char *name,
 #ifdef CONFIG_BLOCK_LEGACY_AUTOLOAD
 	p->probe = probe;
 #endif
-	strlcpy(p->name, name, sizeof(p->name));
+	strscpy(p->name, name, sizeof(p->name));
 	p->next = NULL;
 	index = major_to_index(major);
 
-- 
2.35.1