Re: [PATCH net] net: rnpgbe: Pass an expression directly in rnpgbe_rm_adapter()

[Markus Elfring]

>> The address of a data structure member was determined before
>> a corresponding null pointer check in the implementation of
>> the function “rnpgbe_rm_adapter”.
>>
>> Thus avoid the risk for undefined behaviour by omitting the variable “hw”.
>> Pass the required address directly to a function call.
>>
>> This issue was detected by using the Coccinelle software.
>>
>> Fixes: 2ee95ec17e97c58b65e978a08b75fa8cb6424e4e ("net: rnpgbe: Add register_netdev")
> 
> There is no NULL dereference here.  It's just pointer math.
> No need for a Fixes tag.

How does your view fit to information in an article like “Fun with NULL pointers, part 1”(by Jonathan Corbet from 2009-07-20)?
https://lwn.net/Articles/342330/

Regards,
Markus