board: toradex: common: fail gracefully on missing NAND chip
If the NAND chip is missing get_nand_dev_by_index() returns NULL. Fail
gracefully in this case.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index 57edb6c..d4f5b18 100644
--- a/board/toradex/common/tdx-cfg-block.c
+++ b/board/toradex/common/tdx-cfg-block.c
@@ -156,10 +156,13 @@
static int read_tdx_cfg_block_from_nand(unsigned char *config_block)
{
size_t size = TDX_CFG_BLOCK_MAX_SIZE;
+ struct mtd_info *mtd = get_nand_dev_by_index(0);
+
+ if (!mtd)
+ return -ENODEV;
/* Read production parameter config block from NAND page */
- return nand_read_skip_bad(get_nand_dev_by_index(0),
- CONFIG_TDX_CFG_BLOCK_OFFSET,
+ return nand_read_skip_bad(mtd, CONFIG_TDX_CFG_BLOCK_OFFSET,
&size, NULL, TDX_CFG_BLOCK_MAX_SIZE,
config_block);
}