[PATCH 2/2] mtd: mtdsuper: replace simple_strtoul with kstrtouint

[Haoyu Lu]

Modernize string-to-number conversion in mtdsuper.c by replacing
simple_strtoul with kstrtouint. This change provides proper type safety
for MTD device numbers which are non-negative integers.

Using kstrtouint avoids unsigned long to int conversion and is more
appropriate for device indices. The debug output format specifier is
updated to %u for unsigned int.

Signed-off-by: Haoyu Lu <hechushiguitu666 at gmail.com>
---
 drivers/mtd/mtdsuper.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index b7e3763c47f0..c709ff7aa6b5 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -132,12 +132,12 @@ int get_tree_mtd(struct fs_context *fc,

 		} else if (isdigit(fc->source[3])) {
 			/* mount by MTD device number name */
-			char *endptr;
+			unsigned int mtdnr_val;

-			mtdnr = simple_strtoul(fc->source + 3, &endptr, 0);
-			if (!*endptr) {
+			if (kstrtouint(fc->source + 3, 0, &mtdnr_val) == 0) {
+				mtdnr = mtdnr_val;
 				/* It was a valid number */
-				pr_debug("MTDSB: mtd%%d, mtdnr %d\n", mtdnr);
+				pr_debug("MTDSB: mtd%%d, mtdnr %u\n", mtdnr_val);
 				return mtd_get_sb_by_nr(fc, mtdnr, fill_super);
 			}
 		}
--
2.53.0.windows.1