mtd: mtdsuper: replace simple_strtoul with kstrtouint

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@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index b7e3763c47f0cdf6d27b8145ffbb26b281179311..c709ff7aa6b575d23876312d2bbc1ce917ec95bd 100644 (file)
--- 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);
                        }
                }