mtd: Be more strict on the "mtdparts=" prefix check

strstr() does not guarantee that the string we're searching for is
placed at the beginning. Use strncmp() instead.

Fixes: 5db66b3aee6f ("cmd: mtd: add 'mtd' command")
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Heiko Schocher <hs@denx.de>

diff --git a/drivers/mtd/mtd_uboot.c b/drivers/mtd/mtd_uboot.c
index c4434d7..d551aee 100644 (file)
--- a/drivers/mtd/mtd_uboot.c
+++ b/drivers/mtd/mtd_uboot.c
@@ -215,7 +215,7 @@ int mtd_probe_devices(void)
                return 0;
 
        /* Start the parsing by ignoring the extra 'mtdparts=' prefix, if any */
-       if (strstr(mtdparts, "mtdparts="))
+       if (!strncmp(mtdparts, "mtdparts=", sizeof("mtdparts=") - 1))
                mtdparts += 9;
 
        /* For each MTD device in mtdparts */