RFC on PCI Device Lock

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Hi Bjorn, Alex;

Since my recent series to relocate secondary bus reset code into the PCI core,
we hit a deadlock while trying to obtain a device lock during probe since
device lock is already held.

https://bugzilla.kernel.org/show_bug.cgi?id=200985

I posted a patch into the bugzilla so that we skip locks if we are probing
to follow the same strategy found in other lock routines in pci.c.

https://bugzilla.kernel.org/attachment.cgi?id=278221

I wanted to hear some opinions since this is a regression and need to find
a solution and also waiting for test feedback

Sinan



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