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mei: reduce flow control only for completed messages

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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>
This commit is contained in:
Tomas Winkler 2013-04-23 07:38:12 +03:00 committed by Greg Kroah-Hartman
parent 0cfee51c7c
commit 7013539381
1 changed files with 4 additions and 3 deletions
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7
drivers/misc/mei/interrupt.c
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@ -356,13 +356,14 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
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;
}