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mei: add mei_hbuf_acquire wrapper

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A client has to acquire host buffer
before writing, we add lock like wrapper
to replace the code snippet

if (dev->hbuf_is_ready)
        dev->hbuf_is_ready = false;

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
2014-02-19 17:35:47 +02:00
committed by Greg Kroah-Hartman
parent 4a22176aa8
commit 6aae48ff18
7 changed files with 57 additions and 47 deletions
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17
drivers/misc/mei/hw-txe.c
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@@ -605,7 +605,6 @@ static int mei_txe_write(struct mei_device *dev,
mei_txe_input_payload_write(dev, i + 1, reg);
}
dev->hbuf_is_ready = false;
/* Set Input-Doorbell */
mei_txe_input_doorbell_set(hw);
@@ -983,20 +982,16 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id)
dev->hbuf_is_ready = true;
if (hw->aliveness && dev->hbuf_is_ready) {
/* if SeC did not complete reading the written data by host */
if (!mei_txe_is_input_ready(dev)) {
dev_dbg(&dev->pdev->dev, "got Input Ready Int, but SEC_IPC_INPUT_STATUS_RDY is 0.\n");
goto end;
}
/* get the real register value */
dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
rets = mei_irq_write_handler(dev, &complete_list);
if (rets)
dev_err(&dev->pdev->dev,
"mei_irq_write_handler ret = %d.\n", rets);
if (rets && rets != -EMSGSIZE)
dev_err(&dev->pdev->dev, "mei_irq_write_handler ret = %d.\n",
rets);
dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
}
mei_irq_compl_handler(dev, &complete_list);
end: