From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nick Piggin Message-Id: <20061012120140.29671.39388.sendpatchset@linux.site> In-Reply-To: <20061012120102.29671.31163.sendpatchset@linux.site> References: <20061012120102.29671.31163.sendpatchset@linux.site> Subject: [patch 4/5] mm: incorrect VM_FAULT_OOM returns from drivers Date: Thu, 12 Oct 2006 16:10:11 +0200 (CEST) Sender: owner-linux-mm@kvack.org Return-Path: To: Linux Memory Management Cc: Linux Kernel , Nick Piggin , Andrew Morton List-ID: Some drivers are returning OOM when it is not in response to a memory shortage. Signed-off-by: Nick Piggin Index: linux-2.6/drivers/char/drm/drm_vm.c =================================================================== --- linux-2.6.orig/drivers/char/drm/drm_vm.c +++ linux-2.6/drivers/char/drm/drm_vm.c @@ -147,14 +147,14 @@ static __inline__ struct page *drm_do_vm 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 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 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; Index: linux-2.6/sound/core/pcm_native.c =================================================================== --- linux-2.6.orig/sound/core/pcm_native.c +++ linux-2.6/sound/core/pcm_native.c @@ -3025,7 +3025,7 @@ static struct page * snd_pcm_mmap_status struct page * page; if (substream == NULL) - return NOPAGE_OOM; + return NOPAGE_SIGBUS; runtime = substream->runtime; page = virt_to_page(runtime->status); get_page(page); @@ -3068,7 +3068,7 @@ static struct page * snd_pcm_mmap_contro struct page * page; if (substream == NULL) - return NOPAGE_OOM; + return NOPAGE_SIGBUS; runtime = substream->runtime; page = virt_to_page(runtime->control); get_page(page); @@ -3129,18 +3129,18 @@ static struct page *snd_pcm_mmap_data_no 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); Index: linux-2.6/sound/oss/via82cxxx_audio.c =================================================================== --- linux-2.6.orig/sound/oss/via82cxxx_audio.c +++ linux-2.6/sound/oss/via82cxxx_audio.c @@ -2120,8 +2120,8 @@ static struct page * via_mm_nopage (stru 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); Index: linux-2.6/sound/usb/usx2y/usX2Yhwdep.c =================================================================== --- linux-2.6.orig/sound/usb/usx2y/usX2Yhwdep.c +++ linux-2.6/sound/usb/usx2y/usX2Yhwdep.c @@ -48,7 +48,7 @@ static struct page * snd_us428ctls_vm_no 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); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org