mei: use only one buffer in callback

The callback structure is used exclusively for reading or writing
therefore there is no reason to hold both response and request buffers
in the callback structure

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 10 insertions, 37 deletions

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index d9f4e28ac972..5ecb6cc79d70 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -376,8 +376,7 @@ void mei_io_cb_free(struct mei_cl_cb *cb)
 	if (cb == NULL)
 		return;
 
-	kfree(cb->request_buffer.data);
-	kfree(cb->response_buffer.data);
+	kfree(cb->buf.data);
 	kfree(cb);
 }
 
@@ -406,7 +405,7 @@ struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp)
 }
 
 /**
- * mei_io_cb_alloc_req_buf - allocate request buffer
+ * mei_io_cb_alloc_buf - allocate callback buffer
  *
  * @cb: io callback structure
  * @length: size of the buffer
@@ -415,7 +414,7 @@ struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp)
  *         -EINVAL if cb is NULL
  *         -ENOMEM if allocation failed
  */
-int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length)
+int mei_io_cb_alloc_buf(struct mei_cl_cb *cb, size_t length)
 {
 	if (!cb)
 		return -EINVAL;
@@ -423,38 +422,12 @@ int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length)
 	if (length == 0)
 		return 0;
 
-	cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
-	if (!cb->request_buffer.data)
+	cb->buf.data = kmalloc(length, GFP_KERNEL);
+	if (!cb->buf.data)
 		return -ENOMEM;
-	cb->request_buffer.size = length;
+	cb->buf.size = length;
 	return 0;
 }
-/**
- * mei_io_cb_alloc_resp_buf - allocate response buffer
- *
- * @cb: io callback structure
- * @length: size of the buffer
- *
- * Return: 0 on success
- *         -EINVAL if cb is NULL
- *         -ENOMEM if allocation failed
- */
-int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length)
-{
-	if (!cb)
-		return -EINVAL;
-
-	if (length == 0)
-		return 0;
-
-	cb->response_buffer.data = kmalloc(length, GFP_KERNEL);
-	if (!cb->response_buffer.data)
-		return -ENOMEM;
-	cb->response_buffer.size = length;
-	return 0;
-}
-
-
 
 /**
  * mei_cl_flush_queues - flushes queue lists belonging to cl.
@@ -1005,7 +978,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
 		goto out;
 	}
 
-	rets = mei_io_cb_alloc_resp_buf(cb, length);
+	rets = mei_io_cb_alloc_buf(cb, length);
 	if (rets)
 		goto out;
 
@@ -1059,7 +1032,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 
 	dev = cl->dev;
 
-	buf = &cb->request_buffer;
+	buf = &cb->buf;
 
 	rets = mei_cl_flow_ctrl_creds(cl);
 	if (rets < 0)
@@ -1094,7 +1067,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 	}
 
 	cl_dbg(dev, cl, "buf: size = %d idx = %lu\n",
-			cb->request_buffer.size, cb->buf_idx);
+			cb->buf.size, cb->buf_idx);
 
 	rets = mei_write_message(dev, &mei_hdr, buf->data + cb->buf_idx);
 	if (rets) {
@@ -1144,7 +1117,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
 	dev = cl->dev;
 
 
-	buf = &cb->request_buffer;
+	buf = &cb->buf;
 
 	cl_dbg(dev, cl, "size=%d\n", buf->size);