dm-stripe: small code cleanup

JIRA: https://issues.redhat.com/browse/RHEL-119009
Upstream Status: kernel/git/torvalds/linux.git

commit 9f2f631
Author: Mikulas Patocka <mpatocka@redhat.com>
Date:   Tue Jun 3 18:58:47 2025 +0200

    dm-stripe: small code cleanup

    This commit doesn't fix any bug, it is just code cleanup. Use the
    function format_dev_t instead of sprintf, because format_dev_t does the
    same thing.

    Remove the useless memset call.

    An unsigned integer can take at most 10 digits, so extend the array size
    to 22. (note that because the range of minor and major numbers is limited,
    the size 16 could not be exceeded, thus this function couldn't write
    beyond string end)

    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>

Author: bmarzins

drivers/md/dm-stripe.c

@@ -405,7 +405,7 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
 		blk_status_t *error)
 {
 	unsigned int i;
-	char major_minor[16];
+	char major_minor[22];
 	struct stripe_c *sc = ti->private;
 
 	if (!*error)
@@ -417,8 +417,7 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
 	if (*error == BLK_STS_NOTSUPP)
 		return DM_ENDIO_DONE;
 
-	memset(major_minor, 0, sizeof(major_minor));
-	sprintf(major_minor, "%d:%d", MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)));
+	format_dev_t(major_minor, bio_dev(bio));
 
 	/*
 	 * Test to see which stripe drive triggered the event