mei: fix reading large reposnes
While writting to device is limitted to max_msg_length advertized
in client properites the read can be much longer delivered consequiting chunks.
We use krealloc to enlarge the buffer when needed.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 9541aa9..7189274 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -624,7 +624,7 @@
*
* returns 0 on success, <0 on failure.
*/
-int mei_cl_read_start(struct mei_cl *cl)
+int mei_cl_read_start(struct mei_cl *cl, size_t length)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
@@ -657,8 +657,9 @@
if (!cb)
return -ENOMEM;
- rets = mei_io_cb_alloc_resp_buf(cb,
- dev->me_clients[i].props.max_msg_length);
+ /* always allocate at least client max message */
+ length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
+ rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
goto err;