[ARM] Remove '__address' from scatterlist and convert to DMA API

The old __address element in struct scatterlist remained from older
kernels because the ARM DMA emulation code made use of it.  Move
this field into struct dma_struct, and convert DMA emulation code
to setup a SG entry as required.

Also, convert DMA emulation code to use the new DMA API rather
than the PCI DMA API.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 4 insertions, 9 deletions

diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c
index 3aedada71046..913fd947528c 100644
--- a/arch/arm/kernel/dma.c
+++ b/arch/arm/kernel/dma.c
@@ -123,7 +123,6 @@ void set_dma_sg (dmach_t channel, struct scatterlist *sg, int nr_sg)
 
         dma->sg = sg;
         dma->sgcount = nr_sg;
-        dma->using_sg = 1;
         dma->invalid = 1;
 }
 
@@ -139,10 +138,8 @@ void __set_dma_addr (dmach_t channel, void *addr)
                 printk(KERN_ERR "dma%d: altering DMA address while "
                        "DMA active\n", channel);
 
-        dma->sg = &dma->buf;
-        dma->sgcount = 1;
-        dma->buf.__address = addr;
-        dma->using_sg = 0;
+        dma->sg = NULL;
+        dma->addr = addr;
         dma->invalid = 1;
 }
 
@@ -158,10 +155,8 @@ void set_dma_count (dmach_t channel, unsigned long count)
                 printk(KERN_ERR "dma%d: altering DMA count while "
                        "DMA active\n", channel);
 
-        dma->sg = &dma->buf;
-        dma->sgcount = 1;
-        dma->buf.length = count;
-        dma->using_sg = 0;
+        dma->sg = NULL;
+        dma->count = count;
         dma->invalid = 1;
 }