zfsonlinux/zfs — pull request #987 by cwedgwood (2012-09-24 17:41:09+00:00)
Title: zvol_probe should return NULL when the device isn't found.

Previously we returned ERR_PTR(-ENOENT) which the rest of the kernel
doesn't expect and as such we can oops.

Issue https://github.com/zfsonlinux/zfs/issues/949

Signed-off-by: Chris Wedgwood