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authorLv Zheng <lv.zheng@intel.com>2016-09-07 16:50:14 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-09-10 02:33:49 +0200
commit46922d2a3aff5122253d97e64500801c08f4f2c0 (patch)
tree4417cc9c60cd932e592a9940a6c0cbb7dca4eac9 /drivers/acpi/ec.c
parent72c77b7ea9ce781f4987840984a462e4456ba98e (diff)
downloadlinux-46922d2a3aff5122253d97e64500801c08f4f2c0.tar.bz2
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>
Diffstat (limited to 'drivers/acpi/ec.c')
-rw-r--r--drivers/acpi/ec.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 9eab651a4502..50895fff6964 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -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;
}