Re: [PATCH 2/4][v2] PM / hibernate: Check the success of generating md5 digest before hibernation

[Thomas Gleixner]

On Wed, 12 Sep 2018, Chen Yu wrote:
>  static bool hibernation_e820_mismatch(void *buf)
> @@ -306,6 +307,7 @@ static bool hibernation_e820_mismatch(void *buf)
>  int arch_hibernation_header_save(void *addr, unsigned int max_size)
>  {
>       struct restore_data_record *rdr = addr;
> +     int ret = -EINVAL;

What's the point of initializing ret?

>       if (max_size < sizeof(struct restore_data_record))
>               return -EOVERFLOW;
> @@ -333,7 +335,9 @@ int arch_hibernation_header_save(void *addr, unsigned int 
> max_size)
>  
>       rdr->magic = RESTORE_MAGIC;
>  
> -     hibernation_e820_save(rdr->e820_digest);
> +     ret = hibernation_e820_save(rdr->e820_digest);
> +     if (ret)
> +             return ret;
>  
>       return 0;

And what;s the point of ret at all?

        return hibernation_e820_save();

is effectivly the same.

Thanks,

        tglx