[U-Boot] [PATCH] nand: Fix set_dev checks for no device

[Scott Wood]

On Tue, 2016-08-23 at 14:26 -0700, Tony Lindgren wrote:
> If we do nand device 0 command in u-boot on a device that has NAND support
> enabled but no NAND chip, we can get data abort at least on omaps.
> 
> Fix the issue by adding a check for nand_info[dev].
> 
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> --- a/cmd/nand.c
> +++ b/cmd/nand.c
> @@ -116,7 +116,7 @@ free_dat:
>  static int set_dev(int dev)
>  {
>  	if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE ||
> -	    !nand_info[dev]->name) {
> +	    !nand_info[dev] || !nand_info[dev]->name) {
>  		puts("No such device\n");
>  		return -1;
>  	}

The new !nand_info[dev] check can replace the old name check (similarly to how
commit 4cc9699be7ffc replaced the old zero-blocksize check).

-Scott