From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Thu, 2 Nov 2023 11:27:33 +0000 (+0100)
Subject: mtd: nand: complete nand_register() arguments check
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-favicon.png?a=commitdiff_plain;h=6b3d175928417f55537fe271df983f7ed52915f3;p=u-boot.git

mtd: nand: complete nand_register() arguments check

The patch checks that the "mtd" parameter is accessible before
proceeding.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Link: https://lore.kernel.org/all/20231102112743.57420-1-dario.binacchi@amarulasolutions.com
---

diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c
index 4c18861aa2..c1a0ebe648 100644
--- a/drivers/mtd/nand/raw/nand.c
+++ b/drivers/mtd/nand/raw/nand.c
@@ -52,7 +52,7 @@ int nand_mtd_to_devnum(struct mtd_info *mtd)
 /* Register an initialized NAND mtd device with the U-Boot NAND command. */
 int nand_register(int devnum, struct mtd_info *mtd)
 {
-	if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
+	if (!mtd || devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
 		return -EINVAL;
 
 	nand_info[devnum] = mtd;