[PATCH] V4L/DVB: (3113) Convert em28xx to use vm_insert_page instead of remap_pfn_range

Convert em28xx to use vm_insert_page instead of remap_pfn_range

Signed-off-by: Sascha Sommer <saschasommer@freenet.de>
Signed-off-by: Michael Krufky <mkrufky@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 16 deletions

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index c08e505e7009..8ecaa0803e08 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -189,16 +189,6 @@ static DECLARE_RWSEM(em28xx_disconnect);
 
 /*********************  v4l2 interface  ******************************************/
 
-static inline unsigned long kvirt_to_pa(unsigned long adr)
-{
-        unsigned long kva, ret;
-
-        kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
-        kva |= adr & (PAGE_SIZE - 1);
-        ret = __pa(kva);
-        return ret;
-}
-
 /*
  * em28xx_config()
  * inits registers with sane defaults
@@ -616,7 +606,8 @@ static struct vm_operations_struct em28xx_vm_ops = {
 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 {
         unsigned long size = vma->vm_end - vma->vm_start,
-            start = vma->vm_start, pos, page;
+            start = vma->vm_start;
+        void *pos;
         u32 i;
 
         struct em28xx *dev = filp->private_data;
@@ -657,12 +648,10 @@ static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
         vma->vm_flags |= VM_IO;
         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 
-        pos = (unsigned long)dev->frame[i].bufmem;
+        pos = dev->frame[i].bufmem;
         while (size > 0) {      /* size is page-aligned */
-                page = vmalloc_to_pfn((void *)pos);
-                if (remap_pfn_range(vma, start, page, PAGE_SIZE,
-                                    vma->vm_page_prot)) {
-                        em28xx_videodbg("mmap: rename page map failed\n");
+                if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
+                        em28xx_videodbg("mmap: vm_insert_page failed\n");
                         up(&dev->fileop_lock);
                         return -EAGAIN;
                 }