V4L/DVB (9120): gspca: sd_desc->start returns a value and static functions in m5602.

[linux-2.6-omap-h63xx.git] / drivers / media / video / videobuf-dma-sg.c

diff --git a/drivers/media/video/videobuf-dma-sg.c b/drivers/media/video/videobuf-dma-sg.c
index e6ce99ff7fd1caa8d29025676f620360c95cd3c5..bc6d5aba0fe676089491687ec4d2f9f52f80c045 100644 (file)
--- a/drivers/media/video/videobuf-dma-sg.c
+++ b/drivers/media/video/videobuf-dma-sg.c
@@ -1,7 +1,7 @@
 /*
  * helper functions for SG DMA video4linux capture buffers
  *
- * The functions expect the hardware being able to scatter gatter
+ * The functions expect the hardware being able to scatter gather
  * (i.e. the buffers are not linear in physical memory, but fragmented
  * into PAGE_SIZE chunks).  They also assume the driver does not need
  * to touch the video data.
@@ -80,17 +80,15 @@ struct scatterlist*
 videobuf_pages_to_sg(struct page **pages, int nr_pages, int offset)
 {
        struct scatterlist *sglist;
-       int i = 0;
+       int i;
 
        if (NULL == pages[0])
                return NULL;
-       sglist = kcalloc(nr_pages, sizeof(*sglist), GFP_KERNEL);
+       sglist = kmalloc(nr_pages * sizeof(*sglist), GFP_KERNEL);
        if (NULL == sglist)
                return NULL;
        sg_init_table(sglist, nr_pages);
 
-       if (NULL == pages[0])
-               goto nopage;
        if (PageHighMem(pages[0]))
                /* DMA to highmem pages might not work */
                goto highmem;
@@ -162,9 +160,6 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma,
        dprintk(1,"init user [0x%lx+0x%lx => %d pages]\n",
                data,size,dma->nr_pages);
 
-       dma->varea = (void *) data;
-
-
        err = get_user_pages(current,current->mm,
                             data & PAGE_MASK, dma->nr_pages,
                             rw == READ, 1, /* force */
@@ -252,7 +247,7 @@ int videobuf_dma_map(struct videobuf_queue* q, struct videobuf_dmabuf *dma)
                                        dma->nr_pages, dma->direction);
                if (0 == dma->sglen) {
                        printk(KERN_WARNING
-                              "%s: videobuf_map_sg failed\n",__FUNCTION__);
+                              "%s: videobuf_map_sg failed\n",__func__);
                        kfree(dma->sglist);
                        dma->sglist = NULL;
                        dma->sglen = 0;
@@ -300,7 +295,6 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma)
 
        vfree(dma->vmalloc);
        dma->vmalloc = NULL;
-       dma->varea = NULL;
 
        if (dma->bus_addr) {
                dma->bus_addr = 0;
@@ -430,12 +424,22 @@ static void *__videobuf_alloc(size_t size)
        videobuf_dma_init(&mem->dma);
 
        dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
-               __FUNCTION__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
+               __func__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
                mem,(long)sizeof(*mem));
 
        return vb;
 }
 
+static void *__videobuf_to_vmalloc (struct videobuf_buffer *buf)
+{
+       struct videobuf_dma_sg_memory *mem = buf->priv;
+       BUG_ON(!mem);
+
+       MAGIC_CHECK(mem->magic, MAGIC_SG_MEM);
+
+       return mem->dma.vmalloc;
+}
+
 static int __videobuf_iolock (struct videobuf_queue* q,
                              struct videobuf_buffer *vb,
                              struct v4l2_framebuffer *fbuf)
@@ -681,6 +685,7 @@ static struct videobuf_qtype_ops sg_ops = {
        .mmap_mapper  = __videobuf_mmap_mapper,
        .video_copy_to_user = __videobuf_copy_to_user,
        .copy_stream  = __videobuf_copy_stream,
+       .vmalloc      = __videobuf_to_vmalloc,
 };
 
 void *videobuf_sg_alloc(size_t size)