ACPI: EC: Check if boot_ec was really found in DSDT
acpi_get_devices() returns success if it did not find any device.
We have to check for this case.
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Daniel Ritz <daniel.ritz-ml@swissonline.ch>
Tested-by: Luca <kronos.it@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 43749c8..3f7935a 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -886,7 +886,8 @@
printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n");
status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device,
boot_ec, NULL);
- if (ACPI_FAILURE(status))
+ /* Check that acpi_get_devices actually find something */
+ if (ACPI_FAILURE(status) || !boot_ec->handle)
goto error;
}