Hi Brian Norris, I'm wishing to change a driver from using "hard_header_len" to using "needed_headroom" to declare its needed headroom. I submitted a patch and it is decided it needs to be reviewed. I see you submitted a similar patch in the past. So I think you might be able to help review my patch. Can you help review my patch? Thanks!
The patch is at: http://patchwork.ozlabs.org/project/netdev/patch/20200726110524.151957-1-xie.he.0...@gmail.com/ As you have noted in the commit message of your patch, hard_header_len has special meaning in AF_PACKET so we need to use needed_headroom instead when we just need to reserve some header space. I believe the value of hard_header_len should be the same as the length of the header created by dev_hard_header.