> > <snip>
> > @@ -918,10 +918,7 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
> > virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
> > if (!virt_addr) {
> > rcu_read_unlock();
> > - virt_addr = acpi_os_ioremap(phys_addr, size);
> > - if (!virt_addr)
> > - return AE_BAD_ADDRESS;
> > - unmap = true;
> > + return AE_BAD_ADDRESS;
>
> No. We can not do that. Because some users rely on acpi_os_read_memory to do ioremap for them.
Thank you for giving me the information.
> The correct fixing should be pre-map the io-memory that may be accessed in erst code patch with acpi_map().
I will take a look at the code.
Seiji
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