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Commitcc0cc23bab("powerpc/xive: Untangle xive from child interrupt controller drivers") changed xive_irq_data to be stashed to chip_data instead of handler_data. However, multiple places are still attempting to read xive_irq_data from handler_data and get a NULL pointer deference bug. Update them to read xive_irq_data from chip_data. Non-XIVE files which touch xive_irq_data seem quite strange to me, especially the ocxl driver. I think there ought to be an alternative platform-independent solution, instead of touching XIVE's data directly. Therefore, I think this whole thing should be cleaned up. But perhaps I just misunderstand something. In any case, this cleanup would not be trivial; for now, just get things working again. Fixes:cc0cc23bab("powerpc/xive: Untangle xive from child interrupt controller drivers") Reported-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Closes: https://lore.kernel.org/linuxppc-dev/68e48df8.170a0220.4b4b0.217d@mx.google.com/ Signed-off-by: Nam Cao <namcao@linutronix.de> Reviewed-by: Ganesh Goudar <ganeshgr@linux.ibm.com> Acked-by: Andrew Donnellan <ajd@linux.ibm.com> # ocxl Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20251008081359.1382699-1-namcao@linutronix.de