From: Jan Glauber <jang@linux.vnet.ibm.com>
Date: Wed, 5 Dec 2012 14:06:01 +0000 (+0100)
Subject: s390/pci: enable NEED_DMA_MAP_STATE
X-Git-Tag: firefly_0821_release~3680^2~1464^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9163003236a52fd1a8ee6ca8a04f7232d001fc98;p=firefly-linux-kernel-4.4.55.git

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 f39a6f54c353..7ea06bee8b30 100644
--- 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"