- if (in_range(addr, range->hw_start, range->size))
- return addr - range->hw_start + range->io_start;
+ if (in_range(addr, range->hw_start, range->size)) {
+ unsigned long cpuaddr;
+
+ cpuaddr = addr - range->hw_start + range->io_start;
+
+ rcu_read_unlock();
+ return cpuaddr;
+ }