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s390/pci: enable NEED_DMA_MAP_STATE

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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>
This commit is contained in:
Jan Glauber 2012-12-05 15:06:01 +01:00 committed by Martin Schwidefsky
parent c59b9f9265
commit 9163003236
1 changed files with 3 additions and 0 deletions
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arch/s390/Kconfig
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@ -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"