Messages in this thread | | | Date | Sun, 4 Oct 2020 21:13:29 +0200 | From | Lukas Wunner <> | Subject | Re: [PATCH v7 3/5] PCI: pciehp: check and wait port status out of DPC before handling DLLSC and PDC |
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On Sat, Oct 03, 2020 at 03:55:12AM -0400, Ethan Zhao wrote: > When root port has DPC capability and it is enabled, then triggered by > errors, DPC DLLSC and PDC etc interrupts will be sent to DPC driver, pciehp > drivers almost at the same time.
Do the DLLSC and PDC events occur as a result of handling the error or do they occur independently?
If the latter, I don't see how we can tell whether the card in the slot is still the same.
If the former, holding the hotplug slot's reset_lock and doing something along the lines of pciehp_reset_slot() (or calling it directly) might solve the race.
Thanks,
Lukas
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