We never cancel SMB1 aio, only SMB2 aio - and in this case we always return a value.
authorJeremy Allison <jra@samba.org>
Thu, 12 Apr 2012 22:11:22 +0000 (15:11 -0700)
committerJeremy Allison <jra@samba.org>
Thu, 12 Apr 2012 22:11:22 +0000 (15:11 -0700)
commitda786cddd68d8777cad5e3d6c6fe5a3beac2a1a7
treedf625dee97386f4ba4c941fcc0f719f6cfb20bf8
parentd399af30c183663f487bf4d086ec4377f84725b0
We never cancel SMB1 aio, only SMB2 aio - and in this case we always return a value.

So pass_cancel is no longer needed.
source3/smbd/aio.c