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OMAP: mailbox: send message in process context 

Schedule the Tasklet to send only when mailbox fifo is full and there are
pending messages in kfifo, else send the message directly in the Process
context. This would avoid needless scheduling of Tasklet for every message
transfer

Signed-off-by: Hari Kanigeri <h-kanigeri2@ti.com>
Acked-by: Hiroshi Doyu <hiroshi.doyu@nokia.com>
This commit is contained in:
Kanigeri, Hari 2010-11-29 20:24:13 +00:00 committed by Hari Kanigeri
parent ab66ac3007
commit a42743c26a
1 changed files with 7 additions and 2 deletions
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9
arch/arm/plat-omap/mailbox.c
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@ -92,20 +92,25 @@ int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg)
struct omap_mbox_queue *mq = mbox->txq;
int ret = 0, len;
spin_lock(&mq->lock);
spin_lock_bh(&mq->lock);
if (kfifo_avail(&mq->fifo) < sizeof(msg)) {
ret = -ENOMEM;
goto out;
}
if (kfifo_is_empty(&mq->fifo) && !__mbox_poll_for_space(mbox)) {
mbox_fifo_write(mbox, msg);
goto out;
}
len = kfifo_in(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
WARN_ON(len != sizeof(msg));
tasklet_schedule(&mbox->txq->tasklet);
out:
spin_unlock(&mq->lock);
spin_unlock_bh(&mq->lock);
return ret;
}
EXPORT_SYMBOL(omap_mbox_msg_send);