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

On Mon, Jul 13, 2026 at 10:22:06AM +0200, Markus Elfring wrote:
> >> 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/
> 

Of course you can't have NULL pointer dereferences but this is not a
dereference, it's just pointer math.

regards,
dan carpenter