On 02/27/2018 01:36 PM, Sebastian Andrzej Siewior wrote:
On 2018-02-27 19:40:34 [+0100], Greg Kroah-Hartman wrote:
On Tue, Feb 27, 2018 at 06:33:14PM +0100, Sebastian Andrzej Siewior wrote:
On 2018-02-27 11:08:56 [-0600], Gary R Hook wrote:
That issue remains unclear to me: Are probes of PCI devices guaranteed to be
serialized? Observations on my CCPs says that they occur in order, but I
don't know for certain that serialization is guaranteed.
Is there a definitive statement on this somewhere that I just don't know
about?
The bus enforces this.
So the question if a driver can probe two devices simultaneously.
Depends on the bus type.
PCI
So the question is whether or not PCI enforces serial activity within a
domain. The CCPs are all on different buses, so that doesn't matter.
I think we don't care in this situation, given that the CCP driver has
minor requirements for locking. I just found it an interesting (albeit
somewhat academic) question.
Thanks,
Gary
