[PATCH] Fix Dreamcast DMA

[Adrian McMenamin]

Signed-off by: Adrian McMenamin <[EMAIL PROTECTED]>

diff --git a/arch/sh/drivers/dma/dma-api.c
b/arch/sh/drivers/dma/dma-api.c
index cf8e119..0c9b3bc 100644
--- a/arch/sh/drivers/dma/dma-api.c
+++ b/arch/sh/drivers/dma/dma-api.c
@@ -31,8 +31,8 @@ struct dma_info *get_dma_info(unsigned int chan)
         * the channel is.
         */
        list_for_each_entry(info, &registered_dmac_list, list) {
-               if ((chan <  info->first_channel_nr) ||
-                   (chan >= info->first_channel_nr + info->nr_channels))
+               if ((chan <  info->first_vchannel_nr) ||
+                   (chan >= info->first_vchannel_nr + info->nr_channels))
                        continue;
 
                return info;
@@ -82,7 +82,7 @@ struct dma_channel *get_dma_channel(unsigned int chan)
 
        for (i = 0; i < info->nr_channels; i++) {
                channel = &info->channels[i];
-               if (channel->chan == chan)
+               if (channel->chan == (chan - info->first_vchannel_nr))
                        return channel;
        }
 
@@ -183,6 +183,7 @@ int dmac_search_free_channel(const char *dev_id)
                        return result;
 
                atomic_set(&channel->busy, 1);
+
                return channel->chan;
        }
 
@@ -194,7 +195,6 @@ int request_dma(unsigned int chan, const char
*dev_id)
        struct dma_channel *channel = { 0 };
        struct dma_info *info = get_dma_info(chan);
        int result;
-
        channel = get_dma_channel(chan);
        if (atomic_xchg(&channel->busy, 1))
                return -EBUSY;
@@ -369,6 +369,7 @@ int register_dmac(struct dma_info *info)
        }
 
        total_channels = get_nr_channels();
+       info->first_vchannel_nr = total_channels;
        for (i = 0; i < info->nr_channels; i++) {
                struct dma_channel *chan = &info->channels[i];
 
@@ -387,7 +388,7 @@ int register_dmac(struct dma_info *info)
        }
 
        list_add(&info->list, &registered_dmac_list);
-
+       
        return 0;
 }
 EXPORT_SYMBOL(register_dmac);
diff --git a/include/asm-sh/dma.h b/include/asm-sh/dma.h
index 6034d4a..4c75b70 100644
--- a/include/asm-sh/dma.h
+++ b/include/asm-sh/dma.h
@@ -111,6 +111,7 @@ struct dma_info {
 
        struct list_head list;
        int first_channel_nr;
+       int first_vchannel_nr;
 };
 
 struct dma_chan_caps {

-
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