core->hfi_sys_ops is populated only during core bring-up, once the firmware generation has been detected. iris_vpu_power_on() enables interrupts earlier than that, so an interrupt (for instance a spurious one) that fires in this window makes iris_hfi_isr_handler() unconditionally dereference a NULL core->hfi_sys_ops and panic. Skip the response handler when hfi_sys_ops has not been set up yet; the interrupt is still acknowledged and the line re-enabled. Fixes: d8a6a63372b8 ("media: qcom: iris: merge hfi_response_ops and hfi_command_ops") Assisted-by: Claude:claude-opus-4-8 Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Signed-off-by: Bryan O'Donoghue <bod@kernel.org>