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mei: add read callback on demand for fixed_address clients

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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>
This commit is contained in:
Alexander Usyskin
2016-06-16 17:58:58 +03:00
committed by Greg Kroah-Hartman
parent 97d549b4d5
commit a808c80cda
2 changed files with 12 additions and 13 deletions
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10
drivers/misc/mei/interrupt.c
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@@ -107,8 +107,14 @@ int mei_cl_irq_read_msg(struct mei_cl *cl,
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)) {