[dpdk-dev] [PATCH v2] pci/linux: copy new id for inserted device

Thomas Monjalon thomas at monjalon.net
Mon Oct 12 23:54:48 CEST 2020


12/10/2020 22:58, Harris, James R:
> 
> On 10/7/20, 8:06 AM, "Thomas Monjalon" <thomas at monjalon.net> wrote:
> 
>     Hi Jim,
> 
>     Sorry I see nobody reviewed your patch.
> 
>     Jim Harris <james.r.harris at intel.com> wrote:
>     > + memcpy(&dev2->id, &dev->id, sizeof(dev2->id));
>     [...]
>     > + memcmp(&dev2->id, &dev->id, sizeof(dev2->id)))
> 
>     Why using memcpy and memcmp instead of simple assignment and comparison?
> 
> Direct assignment and comparison would work too.  I did see some similar cases though using memcpy for rte_pci_addr (which is similar to rte_pci_id) in linux/pci_uio.c and linux/pci_vfio.c.  It wasn't clear to me if direct assignment/comparison for structures was the norm for DPDK.
> 
> I'm happy to send a v2 with a direct assignment/comparison though if that is preferred.

Yes please, direct assignment is preferred.
Thanks




More information about the dev mailing list