[ARM] dma: ensure that the single entry sg is properly initialized

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

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c
index aab24f03ea14..e7828fcd9544 100644
--- a/arch/arm/kernel/dma.c
+++ b/arch/arm/kernel/dma.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/errno.h>
+#include <linux/scatterlist.h>
 
 #include <asm/dma.h>
 
@@ -37,6 +38,9 @@ int __init isa_dma_add(unsigned int chan, dma_t *dma)
 {
         if (!dma->d_ops)
                 return -EINVAL;
+
+        sg_init_table(&dma->buf, 1);
+
         if (dma_chan[chan])
                 return -EBUSY;
         dma_chan[chan] = dma;