Re: [PATCH 1/1] PM: fix oops in suspend/hibernate code
From: Len Brown
Date: Thu Jan 06 2011 - 16:01:32 EST
> ... My theory is that we have mapped the
> same area already using ioremap_cache() and now we're trying to map it again
> using ioremap_nocache(), hence the conflict. I need to confirm this.
On my test box.
BIOS-e820: 0000000077626000 - 0000000077632000 (ACPI NVS)
yet there are at least two tables (FACS and SSDT)
that live in that region, and there are several
run-time AML memory opregions residing in that range too.
So the region has already been mapped by acpi_os_map_memory()
(now using ioremap_cache()) before suspend_nvs_save() runs.
Is there a reason that suspend_nvs_save()
requires a non-cached mapping?
Len Brown, Intel Open Source Technology Center
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/