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 f39a6f54c353cfc181e9906467859cac4263e0ca..7ea06bee8b30db08bbefc667d527f96264d2eb6e 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -479,6 +479,9 @@ config NEED_SG_DMA_LENGTH
 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"