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On some AMD platforms, the SMBus IO region 0xb00 - 0xb07 conflicts with the
corresponding ACPI SystemIO region. This prevents the SMBus host controller
driver to function correctly. We set acpi_enforce_resources to
ENFORCE_RESOURCES_LAX so that the SMBus driver can work normally, even
though a warning message notifying the conflict is printed in system logs.
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
diff -Naur a/drivers/acpi/osl.c b/drivers/acpi/osl.c
--- a/drivers/acpi/osl.c 2013-11-04 05:11:51.000000000 +0530
+++ b/drivers/acpi/osl.c 2014-05-06 16:41:51.078524581 +0530
@@ -1533,7 +1533,7 @@
#define ENFORCE_RESOURCES_LAX 1
#define ENFORCE_RESOURCES_NO 0
-static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
+static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
static int __init acpi_enforce_resources_setup(char *str)
{
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