disable_irq/enable_irq resolve the victim entry by irq number only, ignoring dev_id — teardown/re-setup of the wrong device's handler whenever two registrations share or numerically collide on an irq

Summary

free_irq matches the (irq,dev_id) pair but disable/enable match irq only and take the SLIST head - on shared-INTx multi-GPU or duplicate registrations driver A silently tears down driver B's handler while its own stays armed. No in-tree callers on this shim today. Match-the-pair + lock fix.