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

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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>
This commit is contained in:
Sascha Sommer 2005-12-12 00:37:30 -08:00 committed by Linus Torvalds
parent 225a0cb671
commit 3639c8619d
2 changed files with 9 additions and 61 deletions
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49
drivers/media/video/em28xx/em28xx-core.c
View File

@ -116,48 +116,6 @@ void em28xx_print_ioctl(char *name, unsigned int cmd)
}
}
static void *rvmalloc(size_t size)
{
void *mem;
unsigned long adr;
size = PAGE_ALIGN(size);
mem = vmalloc_32((unsigned long)size);
if (!mem)
return NULL;
memset(mem, 0, size);
adr = (unsigned long)mem;
while (size > 0) {
SetPageReserved(vmalloc_to_page((void *)adr));
adr += PAGE_SIZE;
size -= PAGE_SIZE;
}
return mem;
}
static void rvfree(void *mem, size_t size)
{
unsigned long adr;
if (!mem)
return;
size = PAGE_ALIGN(size);
adr = (unsigned long)mem;
while (size > 0) {
ClearPageReserved(vmalloc_to_page((void *)adr));
adr += PAGE_SIZE;
size -= PAGE_SIZE;
}
vfree(mem);
}
/*
* em28xx_request_buffers()
@ -174,8 +132,10 @@ u32 em28xx_request_buffers(struct em28xx *dev, u32 count)
dev->num_frames = count;
while (dev->num_frames > 0) {
if ((buff = rvmalloc(dev->num_frames * imagesize)))
if ((buff = vmalloc_32(dev->num_frames * imagesize))) {
memset(buff, 0, dev->num_frames * imagesize);
break;
}
dev->num_frames--;
}
@ -218,8 +178,7 @@ void em28xx_queue_unusedframes(struct em28xx *dev)
void em28xx_release_buffers(struct em28xx *dev)
{
if (dev->num_frames) {
rvfree(dev->frame[0].bufmem,
dev->num_frames * PAGE_ALIGN(dev->frame[0].buf.length));
vfree(dev->frame[0].bufmem);
dev->num_frames = 0;
}
}

21
drivers/media/video/em28xx/em28xx-video.c
View File

@ -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;
}