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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-04-06 17:40:27 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-04-06 17:40:27 +0200 |
| commit | d7e0481c0d0f0d2e73d4f1e675cb89d0308d0f7c (patch) | |
| tree | 45479540deff74d4068aeb2c63f4b99db0c79917 /drivers/acpi | |
| parent | 2ce94bc4e056d3e48291aac87a95ebd2a86348ba (diff) | |
| download | linux-d7e0481c0d0f0d2e73d4f1e675cb89d0308d0f7c.tar.bz2 | |
ACPI: EC: Fix up fast path check in acpi_ec_add()
The fast path check in acpi_ec_add() is not incorrect, because in
fact acpi_device_hid(device) can be equal to ACPI_ECDT_HID only if
boot_ec is not NULL, but it may confuse static checkers, so change
it to explicitly check boot_ec upfront and use the slow path if
that pointer is NULL.
Link: https://lore.kernel.org/linux-acpi/20200406144217.GA68494@mwanda/
Fixes: 3d9b8dd8320d ("ACPI: EC: Use fast path in acpi_ec_add() for DSDT boot EC")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 4816df520f72..b4c0152e92aa 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1589,8 +1589,8 @@ 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 ((boot_ec && boot_ec->handle == device->handle) || - !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 { |