mei: add read callback on demand for fixed_address clients
The Fixed address clients do not work with the flow control, and the
packet RX callback was allocated upon TX with anticipation of a
following RX. This won't work if the clients with unsolicited Rx. Rather
than preparing read callback upon a write we allocate one directly on
the reciev path if one doesn't exists.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
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 8b5e4b4..44ba901 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -107,8 +107,14 @@
cb = list_first_entry_or_null(&cl->rd_pending, struct mei_cl_cb, list);
if (!cb) {
- cl_err(dev, cl, "pending read cb not found\n");
- goto out;
+ if (!mei_cl_is_fixed_address(cl)) {
+ cl_err(dev, cl, "pending read cb not found\n");
+ goto out;
+ }
+ cb = mei_cl_alloc_cb(cl, mei_cl_mtu(cl), MEI_FOP_READ, cl->fp);
+ if (!cb)
+ goto out;
+ list_add_tail(&cb->list, &cl->rd_pending);
}
if (!mei_cl_is_connected(cl)) {