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
