Messages in this thread Patch in this message | | | Date | Fri, 2 Apr 2010 18:27:49 +1100 | From | Anton Blanchard <> | Subject | [PATCH] backing-dev: Handle class_create() failure |
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I hit this when we had a bug in IDR for a few days. Basically sysfs would fail to create new inodes since it uses an IDR and therefore class_create would fail.
While we are unlikely to see this fail we may as well handle it instead of oopsing.
Signed-off-by: Anton Blanchard <anton@samba.org> ---
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 0e8ca03..f13e067 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -227,6 +227,9 @@ static struct device_attribute bdi_dev_attrs[] = { static __init int bdi_class_init(void) { bdi_class = class_create(THIS_MODULE, "bdi"); + if (IS_ERR(bdi_class)) + return PTR_ERR(bdi_class); + bdi_class->dev_attrs = bdi_dev_attrs; bdi_debug_init(); return 0;
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