diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 2ef8fde3d32..306da509ec4 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -934,6 +934,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			 * be a result of power cut during erasure.
 			 */
 			ai->maybe_bad_peb_count += 1;
+		fallthrough;
 	case UBI_IO_BAD_HDR:
 		if (ec_err)
 			/*
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 104537784ab..50e43928af0 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1400,12 +1400,15 @@ static int __init bytes_str_to_int(const char *str)
 	switch (*endp) {
 	case 'G':
 		result *= 1024;
+		fallthrough;
 	case 'M':
 		result *= 1024;
+		fallthrough;
 	case 'K':
 		result *= 1024;
 		if (endp[1] == 'i' && endp[2] == 'B')
 			endp += 2;
+		fallthrough;
 	case '\0':
 		break;
 	default: