From aa414dff4f7bef29457592414551becdca72dd6b Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 30 Nov 2006 01:14:51 +0000
Subject: [PATCH] [MIPS] Remove duplicate ISA DMA code for 0 DMA channel case.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/Kconfig | 11 ++++++-----
arch/mips/kernel/Makefile | 1 -
arch/mips/kernel/dma-no-isa.c | 28 ----------------------------
include/asm-mips/dma.h | 2 ++
4 files changed, 8 insertions(+), 34 deletions(-)
delete mode 100644 arch/mips/kernel/dma-no-isa.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index c0da0ffe8d57..96143670759c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -266,8 +266,8 @@ config MIPS_MALTA
select BOOT_ELF32
select HAVE_STD_PC_SERIAL_PORT
select DMA_NONCOHERENT
- select IRQ_CPU
select GENERIC_ISA_DMA
+ select IRQ_CPU
select HW_HAS_PCI
select I8259
select MIPS_BOARDS_GEN
@@ -534,7 +534,7 @@ config SGI_IP22
select HW_HAS_EISA
select IP22_CPU_SCACHE
select IRQ_CPU
- select NO_ISA if ISA
+ select GENERIC_ISA_DMA_SUPPORT_BROKEN
select SWAP_IO_SPACE
select SYS_HAS_CPU_R4X00
select SYS_HAS_CPU_R5000
@@ -881,6 +881,9 @@ config MIPS_NILE4
config MIPS_DISABLE_OBSOLETE_IDE
bool
+config GENERIC_ISA_DMA_SUPPORT_BROKEN
+ bool
+
#
# Endianess selection. Suffiently obscure so many users don't know what to
# answer,so we try hard to limit the available choices. Also the use of a
@@ -1852,13 +1855,11 @@ source "drivers/pci/Kconfig"
config ISA
bool
-config NO_ISA
- bool
-
config EISA
bool "EISA support"
depends on HW_HAS_EISA
select ISA
+ select GENERIC_ISA_DMA
---help---
The Extended Industry Standard Architecture (EISA) bus was
developed as an open alternative to the IBM MicroChannel bus.
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index f35b739d0a12..bbbb8d7cb89b 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -45,7 +45,6 @@ obj-$(CONFIG_MIPS_APSP_KSPD) += kspd.o
obj-$(CONFIG_MIPS_VPE_LOADER) += vpe.o
obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
-obj-$(CONFIG_NO_ISA) += dma-no-isa.o
obj-$(CONFIG_I8259) += i8259.o
obj-$(CONFIG_IRQ_CPU) += irq_cpu.o
obj-$(CONFIG_IRQ_CPU_RM7K) += irq-rm7000.o
diff --git a/arch/mips/kernel/dma-no-isa.c b/arch/mips/kernel/dma-no-isa.c
deleted file mode 100644
index 6df8b07741e3..000000000000
--- a/arch/mips/kernel/dma-no-isa.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004 by Ralf Baechle
- *
- * Dummy ISA DMA functions for systems that don't have ISA but share drivers
- * with ISA such as legacy free PCI.
- */
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-
-DEFINE_SPINLOCK(dma_spin_lock);
-
-int request_dma(unsigned int dmanr, const char * device_id)
-{
- return -EINVAL;
-}
-
-void free_dma(unsigned int dmanr)
-{
-}
-
-EXPORT_SYMBOL(dma_spin_lock);
-EXPORT_SYMBOL(request_dma);
-EXPORT_SYMBOL(free_dma);
diff --git a/include/asm-mips/dma.h b/include/asm-mips/dma.h
index e85849ac165f..23f789c80845 100644
--- a/include/asm-mips/dma.h
+++ b/include/asm-mips/dma.h
@@ -74,7 +74,9 @@
*
*/
+#ifndef GENERIC_ISA_DMA_SUPPORT_BROKEN
#define MAX_DMA_CHANNELS 8
+#endif
/*
* The maximum address in KSEG0 that we can perform a DMA transfer to on this
--
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