Dummy ISA DMA functions for systems that don't have ISA but share

drivers with ISA such as legacy free PCI.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/mips/kernel/dma-no-isa.c b/arch/mips/kernel/dma-no-isa.c
new file mode 100644
index 000000000000..6df8b07741e3
--- /dev/null
+++ b/arch/mips/kernel/dma-no-isa.c
@@ -0,0 +1,28 @@
+/*
+ * 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);