mtd: nand: check nand_mtd_to_devnum() argument
If the "mtd" parameter is NULL, the search will definitely yield a
negative result. In that case, it's better to exit immediately.
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Link: https://lore.kernel.org/all/20231102113829.58852-1-dario.binacchi@amarulasolutions.com
diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c
index c1a0ebe..b591170 100644
--- a/drivers/mtd/nand/raw/nand.c
+++ b/drivers/mtd/nand/raw/nand.c
@@ -41,8 +41,11 @@
{
int i;
+ if (!mtd)
+ return -ENODEV;
+
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
- if (mtd && get_nand_dev_by_index(i) == mtd)
+ if (get_nand_dev_by_index(i) == mtd)
return i;
}