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ACPI / EC: Fix a memory leakage issue in acpi_ec_add() 

When the handler installation failed, there was no code to free the
allocated EC device. This patch fixes this memory leakage issue.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=115021
Reported-and-tested-by: Luya Tshimbalanga <luya@fedoraproject.org>
Tested-by: Jonh Henderson <jw.hendy@gmail.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng 2016-09-07 16:50:14 +08:00 committed by Rafael J. Wysocki
parent 72c77b7ea9
commit 46922d2a3a
1 changed files with 12 additions and 4 deletions
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16
drivers/acpi/ec.c
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@ -1513,14 +1513,18 @@ static int acpi_ec_add(struct acpi_device *device)
return -ENOMEM;
if (ec_parse_device(device->handle, 0, ec, NULL) !=
AE_CTRL_TERMINATE) {
acpi_ec_free(ec);
return -EINVAL;
ret = -EINVAL;
goto err_alloc;
}
/* Find and register all query methods */
acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1,
acpi_ec_register_query_methods, NULL, ec, NULL);
ret = acpi_config_boot_ec(ec, false);
if (ret)
goto err_query;
device->driver_data = ec;
ret = !!request_region(ec->data_addr, 1, "EC data");
@ -1528,13 +1532,17 @@ static int acpi_ec_add(struct acpi_device *device)
ret = !!request_region(ec->command_addr, 1, "EC cmd");
WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr);
ret = acpi_config_boot_ec(ec, false);
/* Reprobe devices depending on the EC */
acpi_walk_dep_device_list(ec->handle);
/* EC is fully operational, allow queries */
acpi_ec_enable_event(ec);
return 0;
err_query:
acpi_ec_remove_query_handlers(ec, true, 0);
err_alloc:
acpi_ec_free(ec);
return ret;
}