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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-03-02 11:25:21 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-03-02 11:25:21 +0100 |
| commit | 3d9b8dd8320de69945ea7ccd0d1a76464138ba37 (patch) | |
| tree | bf0c5601af1f42bda1ee8cfc4741c0c86ee6e98e /drivers/acpi | |
| parent | e3cfabcd736a00c61c3a5ee322186b30c642993a (diff) | |
| download | linux-3d9b8dd8320de69945ea7ccd0d1a76464138ba37.tar.gz linux-3d9b8dd8320de69945ea7ccd0d1a76464138ba37.tar.bz2 linux-3d9b8dd8320de69945ea7ccd0d1a76464138ba37.zip | |
ACPI: EC: Use fast path in acpi_ec_add() for DSDT boot EC
If the boot EC comes from the DSDT, its ACPI handle is equal to the
handle of a device object with the PNP0C09 device ID. If that
device object is passed to acpi_ec_add(), it is not necessary to
allocate a new EC structure for it and parse it, because that has
been done already, so change the function to use the fast path in
that case.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ec.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 116163add41b..355d6973cb70 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1611,7 +1611,8 @@ static int acpi_ec_add(struct acpi_device *device) strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_EC_CLASS); - if (!strcmp(acpi_device_hid(device), ACPI_ECDT_HID)) { + if ((boot_ec && boot_ec->handle == device->handle) || + !strcmp(acpi_device_hid(device), ACPI_ECDT_HID)) { /* Fast path: this device corresponds to the boot EC. */ ec = boot_ec; } else { |