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Commit eb415b8f authored by Nick Piggin's avatar Nick Piggin Committed by Jaroslav Kysela
Browse files

[ALSA] alsa: usx2y nopage 



Convert alsa usx2y driver from nopage to fault.

Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 3ad5afcd

sound/usb/usx2y/usX2Yhwdep.c

+10 −13
Original line number Diff line number Diff line
@@ -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,

		   (address - area->vm_start) >> PAGE_SHIFT,

		   address);

		   vmf->pgoff);

	

	offset = area->vm_pgoff << PAGE_SHIFT;

	offset += address - area->vm_start;

	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_SIGBUS);

	offset = vmf->pgoff << PAGE_SHIFT;

	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)

		*type = VM_FAULT_MINOR;

	snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",

		    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

+7 −13
Original line number Diff line number Diff line
@@ -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 += address - area->vm_start;

	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);

	offset = vmf->pgoff << PAGE_SHIFT;

	vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->hwdep_pcm_shm + offset;

	page = virt_to_page(vaddr);

	get_page(page);



	if (type)

		*type = VM_FAULT_MINOR;



	return page;

	vmf->page = virt_to_page(vaddr);

	get_page(vmf->page);

	return 0;

}





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,

};