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-rw-r--r--drivers/acpi/ec.c14
-rw-r--r--drivers/acpi/scan.c6
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index d411017f8c06..97dc16155a55 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -892,6 +892,17 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
return 0;
}
+int __init acpi_boot_ec_enable(void)
+{
+ if (!boot_ec || boot_ec->handlers_installed)
+ return 0;
+ if (!ec_install_handlers(boot_ec)) {
+ first_ec = boot_ec;
+ return 0;
+ }
+ return -EFAULT;
+}
+
int __init acpi_ec_ecdt_probe(void)
{
int ret;
@@ -924,9 +935,10 @@ int __init acpi_ec_ecdt_probe(void)
goto error;
/* We really need to limit this workaround, the only ASUS,
* which needs it, has fake EC._INI method, so use it as flag.
+ * Keep boot_ec struct as it will be needed soon.
*/
if (ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", &x)))
- goto error;
+ return -ENODEV;
}
ret = ec_install_handlers(boot_ec);
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5b4d462117cf..cbfe9ae7a9e5 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1449,6 +1449,8 @@ static int acpi_bus_scan_fixed(struct acpi_device *root)
return result;
}
+int __init acpi_boot_ec_enable(void);
+
static int __init acpi_scan_init(void)
{
int result;
@@ -1480,6 +1482,10 @@ static int __init acpi_scan_init(void)
* Enumerate devices in the ACPI namespace.
*/
result = acpi_bus_scan_fixed(acpi_root);
+
+ /* EC region might be needed at bus_scan, so enable it now */
+ acpi_boot_ec_enable();
+
if (!result)
result = acpi_bus_scan(acpi_root, &ops);