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, 7 insertions, 9 deletions

diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 466c1d22fb16..60469a0053bb 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -134,19 +134,17 @@ int mei_cl_irq_read_msg(struct mei_cl *cl,
 
 	cl->reading_state = MEI_READING;
 
-	if (cb->response_buffer.size == 0 ||
-	    cb->response_buffer.data == NULL) {
+	if (cb->buf.size == 0 || cb->buf.data == NULL) {
 		cl_err(dev, cl, "response buffer is not allocated.\n");
 		list_move_tail(&cb->list, &complete_list->list);
 		cb->status = -ENOMEM;
 		goto out;
 	}
 
-	if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) {
+	if (cb->buf.size < mei_hdr->length + cb->buf_idx) {
 		cl_dbg(dev, cl, "message overflow. size %d len %d idx %ld\n",
-			cb->response_buffer.size, mei_hdr->length, cb->buf_idx);
-		buffer = krealloc(cb->response_buffer.data,
-				  mei_hdr->length + cb->buf_idx,
+			cb->buf.size, mei_hdr->length, cb->buf_idx);
+		buffer = krealloc(cb->buf.data, mei_hdr->length + cb->buf_idx,
 				  GFP_KERNEL);
 
 		if (!buffer) {
@@ -154,11 +152,11 @@ int mei_cl_irq_read_msg(struct mei_cl *cl,
 			list_move_tail(&cb->list, &complete_list->list);
 			goto out;
 		}
-		cb->response_buffer.data = buffer;
-		cb->response_buffer.size = mei_hdr->length + cb->buf_idx;
+		cb->buf.data = buffer;
+		cb->buf.size = mei_hdr->length + cb->buf_idx;
 	}
 
-	buffer = cb->response_buffer.data + cb->buf_idx;
+	buffer = cb->buf.data + cb->buf_idx;
 	mei_read_slots(dev, buffer, mei_hdr->length);
 
 	cb->buf_idx += mei_hdr->length;