[PATCH] ACPI: EC: Check if boot_ec was really found in DSDT

[Alexey Starikovskiy <astarikovskiy@suse.de>]

From: Alexey Starikovskiy <astarikovskiy@suse.de>

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>
---

 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 43749c8..3f7935a 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -886,7 +886,8 @@ int __init acpi_ec_ecdt_probe(void)
         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;
     }