IB/core: Fix missing RDMA cgroups release in case of failure to register device

commit 2fb4f4eadd180a50112618dd9c5fef7fc50d4f08 upstream.

During IB device registration process, if query_device() fails or if
ib_core fails to registers sysfs entries, rdma cgroup cleanup is
skipped.

Cc: <stable@vger.kernel.org> # v4.2+
Fixes: 4be3a4fa51f4 ("IB/core: Fix kernel crash during fail to initialize device")
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index d7d042a..4dff06a 100644 (file)
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -534,14 +534,14 @@ int ib_register_device(struct ib_device *device,
        ret = device->query_device(device, &device->attrs, &uhw);
        if (ret) {
                pr_warn("Couldn't query the device attributes\n");
-               goto cache_cleanup;
+               goto cg_cleanup;
        }
 
        ret = ib_device_register_sysfs(device, port_callback);
        if (ret) {
                pr_warn("Couldn't register device %s with driver model\n",
                        device->name);
-               goto cache_cleanup;
+               goto cg_cleanup;
        }
 
        device->reg_state = IB_DEV_REGISTERED;
@@ -557,6 +557,8 @@ int ib_register_device(struct ib_device *device,
        mutex_unlock(&device_mutex);
        return 0;
 
+cg_cleanup:
+       ib_device_unregister_rdmacg(device);
 cache_cleanup:
        ib_cache_cleanup_one(device);
        ib_cache_release_one(device);