mtd: rawnand: Make maxchips an unsigned int

There's no good reason to make maxchips a signed integer, since only
positive values are valid. Make it an unsigned int.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/raw/nand_base.c

@@ -5915,11 +5915,12 @@ static int nand_dt_init(struct nand_chip *chip)
  * prevented dynamic allocations during this phase which was unconvenient and
  * as been banned for the benefit of the ->init_ecc()/cleanup_ecc() hooks.
  */
-static int nand_scan_ident(struct nand_chip *chip, int maxchips,
+static int nand_scan_ident(struct nand_chip *chip, unsigned int maxchips,
 			   struct nand_flash_dev *table)
 {
 	struct mtd_info *mtd = nand_to_mtd(chip);
-	int i, nand_maf_id, nand_dev_id;
+	int nand_maf_id, nand_dev_id;
+	unsigned int i;
 	int ret;
 
 	/* Enforce the right timings for reset/detection */
@@ -6730,7 +6731,7 @@ static void nand_detach(struct nand_chip *chip)
  * The flash ID is read and the mtd/chip structures are filled with the
  * appropriate values.
  */
-int nand_scan_with_ids(struct nand_chip *chip, int maxchips,
+int nand_scan_with_ids(struct nand_chip *chip, unsigned int maxchips,
 		       struct nand_flash_dev *ids)
 {
 	int ret;

include/linux/mtd/rawnand.h

@@ -28,10 +28,10 @@ struct nand_chip;
 struct nand_flash_dev;
 
 /* Scan and identify a NAND device */
-int nand_scan_with_ids(struct nand_chip *chip, int max_chips,
+int nand_scan_with_ids(struct nand_chip *chip, unsigned int max_chips,
 		       struct nand_flash_dev *ids);
 
-static inline int nand_scan(struct nand_chip *chip, int max_chips)
+static inline int nand_scan(struct nand_chip *chip, unsigned int max_chips)
 {
 	return nand_scan_with_ids(chip, max_chips, NULL);
 }