linux-kernel - [PATCH -next] block: Replaced simple_strtol() with kstrtoint()/kstrtoul()

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Date:   Mon, 24 May 2021 20:08:33 +0800
From:   Liu Shixin <liushixin2@...wei.com>
To:     Jens Axboe <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Liu Shixin <liushixin2@...wei.com>
Subject: [PATCH -next] block: Replaced simple_strtol() with kstrtoint()/kstrtoul()

The simple_strtol() function is deprecated in some situation since
it does not check for the range overflow. Use kstrtoint()/kstrtoul()
instead.
Attention, if the end of the input string isn't '\n', simple_strtol() will
ignore following characters and return the value but kstrtoint()/kstrtoul()
will return an error code.

Signed-off-by: Liu Shixin <liushixin2@...wei.com>
---
 drivers/block/brd.c  | 3 +--
 drivers/block/loop.c | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 7562cf30b14e..5b43f6b2d506 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -358,8 +358,7 @@ MODULE_ALIAS("rd");
 /* Legacy boot options - nonmodular */
 static int __init ramdisk_size(char *str)
 {
-	rd_size = simple_strtol(str, NULL, 0);
-	return 1;
+	return !kstrtoul(str, 0, &rd_size);
 }
 __setup("ramdisk_size=", ramdisk_size);
 #endif
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index d58d68f3c7cd..9fe595afa9cf 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -2415,8 +2415,7 @@ module_exit(loop_exit);
 #ifndef MODULE
 static int __init max_loop_setup(char *str)
 {
-	max_loop = simple_strtol(str, NULL, 0);
-	return 1;
+	return !kstrtoint(str, 0, &max_loop);
 }
 
 __setup("max_loop=", max_loop_setup);
-- 
2.18.0.huawei.25