From: Chengguang Xu <redacted>
Date: Tue, 26 Jun 2018 09:16:31 +0800

sizeof() will return unsigned value so in the error check
negative error code will be always larger than sizeof().

Fixes: a0d8e02c35ff ("nfp: add support for reading nffw info")

Signed-off-by: Chengguang Xu <redacted>
Acked-by: Jakub Kicinski <redacted>
---
v2:
- Add more information to patch subject and commit log.

I guess the:

	if (x < 0 || x < sizeof(foo))

better self-documents the situation, but this patch is fine too
so I have applied it.

Thanks.