mei: reduce flow control only for completed messages
This fixes bug when only first chunk of a large message split
by hbuf_max_len is written to the hardware.
All the consequent chunks will not get a new credit.
A regression introduced by the commit
0ef319c93cebff9f82bdd0cdbb298f2dd00acda8
mei: streamline write complete flow function
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 7473071..5ee2f07 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -356,13 +356,14 @@
return -ENODEV;
}
- if (mei_cl_flow_ctrl_reduce(cl))
- return -ENODEV;
cl->status = 0;
cb->buf_idx += mei_hdr.length;
- if (mei_hdr.msg_complete)
+ if (mei_hdr.msg_complete) {
+ if (mei_cl_flow_ctrl_reduce(cl))
+ return -ENODEV;
list_move_tail(&cb->list, &dev->write_waiting_list.list);
+ }
return 0;
}