Merge branch 'net-ipa-fix-warning-reported-errors'

Alex Elder says:

====================
net: ipa: fix warning-reported errors

Building the kernel with W=1 produces numerous warnings for the IPA
code.  Some of those warnings turn out to flag real problems, and
this series fixes them.  The first patch fixes the most important
ones, but the second and third are problems I think are worth
treating as bugs as well.

Note:  I'll happily combine any of these if someone prefers that.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>