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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-04-06 17:40:27 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-04-06 17:40:27 +0200
commitd7e0481c0d0f0d2e73d4f1e675cb89d0308d0f7c (patch)
tree45479540deff74d4068aeb2c63f4b99db0c79917 /drivers/acpi
parent2ce94bc4e056d3e48291aac87a95ebd2a86348ba (diff)
downloadlinux-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.c4
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 {