Schedule the Tasklet to send only when mailbox fifo is full and there are pending messages in kifo, 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 <[email protected]> --- arch/arm/plat-omap/mailbox.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index 13698ab..f4177df 100644 --- a/arch/arm/plat-omap/mailbox.c +++ b/arch/arm/plat-omap/mailbox.c @@ -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); -- 1.7.0 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
