Messages in this thread | | | Subject | Re: Can a driver->probe be called for two devices at the same time (WAS: Re: [PATCH] crypto/ccp: don't disable interrupts while setting up debugfs) | From | Gary R Hook <> | Date | Tue, 27 Feb 2018 11:45:59 -0600 |
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On 02/27/2018 11:33 AM, 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? > > So the question if a driver can probe two devices simultaneously. I'm > not sure. We have PROBE_PREFER_ASYNCHRONOUS which defers the probe to > worker. However I have no idea if two of those worker can run at the > same time. > >> I think a mutex would be just fine; I got this wrong, clearly. Let me work >> up a patch using a mutex. > > I've sent one. Why not just ack it and be done with it? > >> Gary > > Sebastian >
Sorry, too much chaos right now. Of course.
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