[PATCH] nvme-pci: calculate iod and avg_seg_size just before use them

[Sagi Grimberg]

>> The calculation of iod and avg_seg_size maybe meaningless if
>> nvme_pci_use_sgls returns before uses them. So calculate
>> just before use them.
> 
> The compiler will do the right thing here, but I see what you mean. I
> think Christoph has some SGL improvements coming, though, that will
> obviate this.

I think that if its not coming for 4.16, it should be easy enough to
take it in.

FWIW,

Reviewed-by: Sagi Grimberg <sagi at grimberg.me>