[ALSA] alsa: usx2y nopage

Convert alsa usx2y driver from nopage to fault.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/usb/usx2y/usX2Yhwdep.c

@@ -34,34 +34,31 @@
 int usX2Y_hwdep_pcm_new(struct snd_card *card);
 
 
-static struct page * snd_us428ctls_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+static int snd_us428ctls_vm_fault(struct vm_area_struct *area,
+				  struct vm_fault *vmf)
 {
 	unsigned long offset;
 	struct page * page;
 	void *vaddr;
 
-	snd_printdd("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
+	snd_printdd("ENTER, start %lXh, pgoff %ld\n",
 		   area->vm_start,
-		   address - area->vm_start,
+		   vmf->pgoff);
-		   (address - area->vm_start) >> PAGE_SHIFT,
-		   address);
 	
-	offset = area->vm_pgoff << PAGE_SHIFT;
+	offset = vmf->pgoff << PAGE_SHIFT;
-	offset += address - area->vm_start;
-	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_SIGBUS);
 	vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
 	page = virt_to_page(vaddr);
 	get_page(page);
-	snd_printdd( "vaddr=%p made us428ctls_vm_nopage() return %p; offset=%lX\n", vaddr, page, offset);
+	vmf->page = page;
 
-	if (type)
+	snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
-		*type = VM_FAULT_MINOR;
+		    vaddr, page);
 
-	return page;
+	return 0;
 }
 
 static struct vm_operations_struct us428ctls_vm_ops = {
-	.nopage = snd_us428ctls_vm_nopage,
+	.fault = snd_us428ctls_vm_fault,
 };
 
 static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)

sound/usb/usx2y/usx2yhwdeppcm.c

@@ -683,30 +683,24 @@ static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area)
 }
 
 
-static struct page * snd_usX2Y_hwdep_pcm_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+static int snd_usX2Y_hwdep_pcm_vm_fault(struct vm_area_struct *area,
+					struct vm_fault *vmf)
 {
 	unsigned long offset;
-	struct page *page;
 	void *vaddr;
 
-	offset = area->vm_pgoff << PAGE_SHIFT;
+	offset = vmf->pgoff << PAGE_SHIFT;
-	offset += address - area->vm_start;
-	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
 	vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->hwdep_pcm_shm + offset;
-	page = virt_to_page(vaddr);
+	vmf->page = virt_to_page(vaddr);
-	get_page(page);
+	get_page(vmf->page);
-
+	return 0;
-	if (type)
-		*type = VM_FAULT_MINOR;
-
-	return page;
 }
 
 
 static struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
 	.open = snd_usX2Y_hwdep_pcm_vm_open,
 	.close = snd_usX2Y_hwdep_pcm_vm_close,
-	.nopage = snd_usX2Y_hwdep_pcm_vm_nopage,
+	.fault = snd_usX2Y_hwdep_pcm_vm_fault,
 };