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[PATCH] mm: incorrect VM_FAULT_OOM returns from drivers 

Some drivers are returning OOM when it is not in response to a memory
shortage.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-12-06 20:31:53 -08:00 committed by Linus Torvalds
parent f2a2a7108a
commit cd54e7e543
4 changed files with 12 additions and 12 deletions
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8
drivers/char/drm/drm_vm.c
View File

@ -147,14 +147,14 @@ static __inline__ struct page *drm_do_vm_shm_nopage(struct vm_area_struct *vma,
if (address > vma->vm_end)
return NOPAGE_SIGBUS; /* Disallow mremap */
if (!map)
return NOPAGE_OOM; /* Nothing allocated */
return NOPAGE_SIGBUS; /* Nothing allocated */
offset = address - vma->vm_start;
i = (unsigned long)map->handle + offset;
page = (map->type == _DRM_CONSISTENT) ?
virt_to_page((void *)i) : vmalloc_to_page((void *)i);
if (!page)
return NOPAGE_OOM;
return NOPAGE_SIGBUS;
get_page(page);
DRM_DEBUG("shm_nopage 0x%lx\n", address);
@ -272,7 +272,7 @@ static __inline__ struct page *drm_do_vm_dma_nopage(struct vm_area_struct *vma,
if (address > vma->vm_end)
return NOPAGE_SIGBUS; /* Disallow mremap */
if (!dma->pagelist)
return NOPAGE_OOM; /* Nothing allocated */
return NOPAGE_SIGBUS; /* Nothing allocated */
offset = address - vma->vm_start; /* vm_[pg]off[set] should be 0 */
page_nr = offset >> PAGE_SHIFT;
@ -310,7 +310,7 @@ static __inline__ struct page *drm_do_vm_sg_nopage(struct vm_area_struct *vma,
if (address > vma->vm_end)
return NOPAGE_SIGBUS; /* Disallow mremap */
if (!entry->pagelist)
return NOPAGE_OOM; /* Nothing allocated */
return NOPAGE_SIGBUS; /* Nothing allocated */
offset = address - vma->vm_start;
map_offset = map->offset - (unsigned long)dev->sg->virtual;

10
sound/core/pcm_native.c
View File

@ -3027,7 +3027,7 @@ static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
struct page * page;
if (substream == NULL)
return NOPAGE_OOM;
return NOPAGE_SIGBUS;
runtime = substream->runtime;
page = virt_to_page(runtime->status);
get_page(page);
@ -3070,7 +3070,7 @@ static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
struct page * page;
if (substream == NULL)
return NOPAGE_OOM;
return NOPAGE_SIGBUS;
runtime = substream->runtime;
page = virt_to_page(runtime->control);
get_page(page);
@ -3131,18 +3131,18 @@ static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
size_t dma_bytes;
if (substream == NULL)
return NOPAGE_OOM;
return NOPAGE_SIGBUS;
runtime = substream->runtime;
offset = area->vm_pgoff << PAGE_SHIFT;
offset += address - area->vm_start;
snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_SIGBUS);
dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
if (offset > dma_bytes - PAGE_SIZE)
return NOPAGE_SIGBUS;
if (substream->ops->page) {
page = substream->ops->page(substream, offset);
if (! page)
return NOPAGE_OOM;
return NOPAGE_OOM; /* XXX: is this really due to OOM? */
} else {
vaddr = runtime->dma_area + offset;
page = virt_to_page(vaddr);

4
sound/oss/via82cxxx_audio.c
View File

@ -2120,8 +2120,8 @@ static struct page * via_mm_nopage (struct vm_area_struct * vma,
return NOPAGE_SIGBUS; /* Disallow mremap */
}
if (!card) {
DPRINTK ("EXIT, returning NOPAGE_OOM\n");
return NOPAGE_OOM; /* Nothing allocated */
DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
return NOPAGE_SIGBUS; /* Nothing allocated */
}
pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);

2
sound/usb/usx2y/usX2Yhwdep.c
View File

@ -48,7 +48,7 @@ static struct page * snd_us428ctls_vm_nopage(struct vm_area_struct *area, unsign
offset = area->vm_pgoff << PAGE_SHIFT;
offset += address - area->vm_start;
snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
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);