V4L/DVB (4685): Fix compiler warning in drivers/media/video/video-buf.c

Using a double cast to avoid compiler warnings when building for PAE. 
Compiler doesn't like direct casting of a 32 bit ptr to 64 bit integer.

Signed-off-by: Martin J. Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/media/video/video-buf.c b/drivers/media/video/video-buf.c
index acc5ea936687..f429f49901b9 100644
--- a/drivers/media/video/video-buf.c
+++ b/drivers/media/video/video-buf.c
@@ -365,7 +365,12 @@ videobuf_iolock(struct videobuf_queue* q, struct videobuf_buffer *vb,
                 if (NULL == fbuf)
                         return -EINVAL;
                 /* FIXME: need sanity checks for vb->boff */
-                bus   = (dma_addr_t)fbuf->base + vb->boff;
+                /*
+                 * Using a double cast to avoid compiler warnings when
+                 * building for PAE. Compiler doesn't like direct casting
+                 * of a 32 bit ptr to 64 bit integer.
+                 */
+                bus   = (dma_addr_t)(unsigned long)fbuf->base + vb->boff;
                 pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT;
                 err = videobuf_dma_init_overlay(&vb->dma,PCI_DMA_FROMDEVICE,
                                                 bus, pages);