mei: client: use sizeof of variable instead of struct type

There is a possibility of bug when variable type has changed but
corresponding struct passed to the sizeof has not.

Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200723145927.882743-5-tomas.winkler@intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/client.c

 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -369,7 +369,7 @@ static struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl,
 {
 	struct mei_cl_cb *cb;
 
-	cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
+	cb = kzalloc(sizeof(*cb), GFP_KERNEL);
 	if (!cb)
 		return NULL;
 
@@ -552,7 +552,7 @@ int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp)
  */
 static void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
 {
-	memset(cl, 0, sizeof(struct mei_cl));
+	memset(cl, 0, sizeof(*cl));
 	init_waitqueue_head(&cl->wait);
 	init_waitqueue_head(&cl->rx_wait);
 	init_waitqueue_head(&cl->tx_wait);
@@ -575,7 +575,7 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev)
 {
 	struct mei_cl *cl;
 
-	cl = kmalloc(sizeof(struct mei_cl), GFP_KERNEL);
+	cl = kmalloc(sizeof(*cl), GFP_KERNEL);
 	if (!cl)
 		return NULL;