iommu/vt-d: Fix infinite loop in free_all_cpu_cached_iovas

Per VT-d spec Section 10.4.2 ("Capability Register"), the maximum
number of possible domains is 64K; indeed this is the maximum value
that the cap_ndoms() macro will expand to.  Since the value 65536
will not fix in a u16, the 'did' variable must be promoted to an
int, otherwise the test for < 65536 will always be true and the
loop will never end.

The symptom, in my case, was a hung machine during suspend.

Fixes: 3bd4f9112f87 ("iommu/vt-d: Fix overflow of iommu->domains array")
Signed-off-by: Aaron Campbell <aaron@monkey.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

path: root/net/iucv/Kconfig

config IUCV
	depends on S390
	def_tristate y if S390
	prompt "IUCV support (S390 - z/VM only)"
	help
	  Select this option if you want to use inter-user communication
	  under VM or VIF. If you run on z/VM, say "Y" to enable a fast
	  communication link between VM guests.

config AFIUCV
	depends on S390
	def_tristate m if QETH_L3 || IUCV
	prompt "AF_IUCV Socket support (S390 - z/VM and HiperSockets transport)"
	help
	  Select this option if you want to use AF_IUCV socket applications
	  based on z/VM inter-user communication vehicle or based on
	  HiperSockets.