RDMA/core: Annotate destroy of mutex to ensure that it is released as…

… unlocked

While compiled with CONFIG_DEBUG_MUTEXES, the kernel ensures that mutex is
not held during destroy. Hence add mutex_destroy() for mutexes used in
RDMA modules.

Link: https://lore.kernel.org/r/20190723065733.4899-2-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/cache.c

@@ -810,6 +810,7 @@ static void release_gid_table(struct ib_device *device,
 	if (leak)
 		return;
 
+	mutex_destroy(&table->lock);
 	kfree(table->data_vec);
 	kfree(table);
 }

drivers/infiniband/core/cma_configfs.c

@@ -342,12 +342,18 @@ static struct configfs_subsystem cma_subsys = {
 
 int __init cma_configfs_init(void)
 {
+	int ret;
+
 	config_group_init(&cma_subsys.su_group);
 	mutex_init(&cma_subsys.su_mutex);
-	return configfs_register_subsystem(&cma_subsys);
+	ret = configfs_register_subsystem(&cma_subsys);
+	if (ret)
+		mutex_destroy(&cma_subsys.su_mutex);
+	return ret;
 }
 
 void __exit cma_configfs_exit(void)
 {
 	configfs_unregister_subsystem(&cma_subsys);
+	mutex_destroy(&cma_subsys.su_mutex);
 }

drivers/infiniband/core/counters.c

@@ -592,7 +592,7 @@ int rdma_counter_get_mode(struct ib_device *dev, u8 port,
 void rdma_counter_init(struct ib_device *dev)
 {
 	struct rdma_port_counter *port_counter;
-	u32 port;
+	u32 port, i;
 
 	if (!dev->ops.alloc_hw_stats || !dev->port_data)
 		return;
@@ -610,13 +610,12 @@ void rdma_counter_init(struct ib_device *dev)
 	return;
 
 fail:
-	rdma_for_each_port(dev, port) {
+	for (i = port; i >= rdma_start_port(dev); i--) {
 		port_counter = &dev->port_data[port].port_counter;
 		kfree(port_counter->hstats);
 		port_counter->hstats = NULL;
+		mutex_destroy(&port_counter->lock);
 	}
-
-	return;
 }
 
 void rdma_counter_release(struct ib_device *dev)
@@ -630,5 +629,6 @@ void rdma_counter_release(struct ib_device *dev)
 	rdma_for_each_port(dev, port) {
 		port_counter = &dev->port_data[port].port_counter;
 		kfree(port_counter->hstats);
+		mutex_destroy(&port_counter->lock);
 	}
 }

drivers/infiniband/core/device.c

@@ -508,6 +508,9 @@ static void ib_device_release(struct device *device)
 			  rcu_head);
 	}
 
+	mutex_destroy(&dev->unregistration_lock);
+	mutex_destroy(&dev->compat_devs_mutex);
+
 	xa_destroy(&dev->compat_devs);
 	xa_destroy(&dev->client_data);
 	kfree_rcu(dev, rcu_head);

drivers/infiniband/core/user_mad.c

@@ -1038,7 +1038,7 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
 				ib_unregister_mad_agent(file->agent[i]);
 
 	mutex_unlock(&file->port->file_mutex);
-
+	mutex_destroy(&file->mutex);
 	kfree(file);
 	return 0;
 }

drivers/infiniband/core/uverbs_main.c

@@ -120,6 +120,8 @@ static void ib_uverbs_release_dev(struct device *device)
 
 	uverbs_destroy_api(dev->uapi);
 	cleanup_srcu_struct(&dev->disassociate_srcu);
+	mutex_destroy(&dev->lists_mutex);
+	mutex_destroy(&dev->xrcd_tree_mutex);
 	kfree(dev);
 }
 
@@ -212,6 +214,8 @@ void ib_uverbs_release_file(struct kref *ref)
 
 	if (file->disassociate_page)
 		__free_pages(file->disassociate_page, 0);
+	mutex_destroy(&file->umap_lock);
+	mutex_destroy(&file->ucontext_lock);
 	kfree(file);
 }
 

drivers/infiniband/core/verbs.c

@@ -2259,6 +2259,7 @@ int ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
 		if (ret)
 			return ret;
 	}
+	mutex_destroy(&xrcd->tgt_qp_mutex);
 
 	return xrcd->device->ops.dealloc_xrcd(xrcd, udata);
 }