s390/pci: enable NEED_DMA_MAP_STATE
The DMA API allows to avoid DMA unmaps because they are NOPs on some
plattforms. But not on s390, so force them.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index f39a6f54..7ea06be 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -479,6 +479,9 @@
config HAVE_DMA_ATTRS
def_bool PCI
+config NEED_DMA_MAP_STATE
+ def_bool PCI
+
config CHSC_SCH
def_tristate m
prompt "Support for CHSC subchannels"