The Tegra driver currently only support a single chip select, hence
check boundaries accordingly. This fixes a off by one issue catched
with Smatch:
drivers/mtd/nand/raw/tegra_nand.c:476 tegra_nand_select_chip()
warn: array off by one? 'nand->cs[die_nr]'
Also warn in case the stack asks for a chip select we currently do
not support.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
struct tegra_nand_chip *nand = to_tegra_chip(chip);
struct tegra_nand_controller *ctrl = to_tegra_ctrl(chip->controller);
- if (die_nr < 0 || die_nr > 1) {
+ WARN_ON(die_nr >= (int)ARRAY_SIZE(nand->cs));
+
+ if (die_nr < 0 || die_nr > 0) {
ctrl->cur_cs = -1;
return;
}