Merge branch 'af_unix-prepare-for-skb-drop-reason'

Kuniyuki Iwashima says:

====================
af_unix: Prepare for skb drop reason.

This is a prep series and cleans up error paths in the following
functions

  * unix_stream_connect()
  * unix_stream_sendmsg()
  * unix_dgram_sendmsg()

to make it easy to add skb drop reason for AF_UNIX, which seems to
have a potential user.

https://lore.kernel.org/netdev/CAAf2ycmZHti95WaBR3s+L5Epm1q7sXmvZ-EqCK=-oZj=45tOwQ@mail.gmail.com/

v1: https://lore.kernel.org/netdev/20241206052607.1197-1-kuniyu@amazon.com/
====================

Link: https://patch.msgid.link/20241213110850.25453-1-kuniyu@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>